/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 14:52:32,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 14:52:32,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 14:52:32,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 14:52:32,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 14:52:32,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 14:52:32,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 14:52:32,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 14:52:32,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 14:52:32,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 14:52:32,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 14:52:32,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 14:52:32,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 14:52:32,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 14:52:32,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 14:52:32,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 14:52:32,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 14:52:32,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 14:52:32,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 14:52:32,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 14:52:32,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 14:52:32,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 14:52:32,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 14:52:32,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 14:52:32,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-09 14:52:32,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 14:52:32,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 14:52:32,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 14:52:32,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 14:52:32,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 14:52:32,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 14:52:32,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 14:52:32,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 14:52:32,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 14:52:32,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 14:52:32,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 14:52:32,437 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 [2020-11-09 14:52:32,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 14:52:32,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 14:52:32,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 14:52:32,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 14:52:32,495 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 14:52:32,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 14:52:32,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 14:52:32,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 14:52:32,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 14:52:32,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 14:52:32,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 14:52:32,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 14:52:32,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 14:52:32,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 14:52:32,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 14:52:32,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 14:52:32,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 14:52:32,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 14:52:32,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 14:52:32,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 14:52:32,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 14:52:32,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 14:52:32,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 14:52:32,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 14:52:32,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 14:52:32,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 14:52:32,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 14:52:32,501 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-11-09 14:52:32,502 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 14:52:32,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 14:52:32,502 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 14:52:32,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 14:52:32,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 14:52:32,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 14:52:32,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 14:52:32,902 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 14:52:32,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 14:52:32,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2257d89c/7df90bba5e8a491ab032229159b3da30/FLAGa4f77e858 [2020-11-09 14:52:33,712 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 14:52:33,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-11-09 14:52:33,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2257d89c/7df90bba5e8a491ab032229159b3da30/FLAGa4f77e858 [2020-11-09 14:52:33,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2257d89c/7df90bba5e8a491ab032229159b3da30 [2020-11-09 14:52:33,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 14:52:33,952 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 14:52:33,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 14:52:33,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 14:52:33,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 14:52:33,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:52:33" (1/1) ... [2020-11-09 14:52:33,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61038537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:33, skipping insertion in model container [2020-11-09 14:52:33,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:52:33" (1/1) ... [2020-11-09 14:52:33,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 14:52:34,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 14:52:34,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 14:52:34,386 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 14:52:34,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 14:52:34,574 INFO L208 MainTranslator]: Completed translation [2020-11-09 14:52:34,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34 WrapperNode [2020-11-09 14:52:34,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 14:52:34,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 14:52:34,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 14:52:34,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 14:52:34,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 14:52:34,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 14:52:34,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 14:52:34,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 14:52:34,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... [2020-11-09 14:52:34,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 14:52:34,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 14:52:34,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 14:52:34,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 14:52:34,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 14:52:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 14:52:34,742 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 14:52:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 14:52:34,742 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 14:52:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 14:52:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 14:52:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 14:52:34,746 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 14:52:35,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 14:52:35,241 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 14:52:35,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:52:35 BoogieIcfgContainer [2020-11-09 14:52:35,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 14:52:35,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 14:52:35,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 14:52:35,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 14:52:35,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:52:33" (1/3) ... [2020-11-09 14:52:35,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b9ee87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:52:35, skipping insertion in model container [2020-11-09 14:52:35,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:52:34" (2/3) ... [2020-11-09 14:52:35,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b9ee87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:52:35, skipping insertion in model container [2020-11-09 14:52:35,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:52:35" (3/3) ... [2020-11-09 14:52:35,257 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-11-09 14:52:35,275 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 14:52:35,275 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 14:52:35,280 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 14:52:35,281 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 14:52:35,328 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,328 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,328 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,329 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,330 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,330 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,330 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,333 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,335 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,335 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,337 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,338 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,339 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,339 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,339 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,340 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,340 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,341 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,342 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,344 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,344 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,344 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,345 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,345 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,359 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,359 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,359 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,360 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 14:52:35,369 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 14:52:35,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 14:52:35,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 14:52:35,420 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 14:52:35,421 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 14:52:35,421 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-11-09 14:52:35,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 14:52:35,421 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 14:52:35,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 14:52:35,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 14:52:35,437 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 14:52:35,438 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:35,443 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:35,445 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 14:52:35,510 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 14:52:35,511 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 14:52:35,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 14:52:35,523 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 14:52:37,621 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 14:52:37,898 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 14:52:38,349 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 14:52:38,469 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 14:52:38,723 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 14:52:38,851 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 14:52:38,886 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 14:52:38,886 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 14:52:38,893 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 14:52:38,902 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 14:52:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 14:52:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 14:52:38,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:38,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 14:52:38,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 14:52:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:38,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381268067] [2020-11-09 14:52:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:39,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381268067] [2020-11-09 14:52:39,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:39,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 14:52:39,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1230127617] [2020-11-09 14:52:39,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:39,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:39,194 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-11-09 14:52:39,195 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:39,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:39,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 14:52:39,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 14:52:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 14:52:39,221 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 14:52:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:39,286 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 14:52:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 14:52:39,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 14:52:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:39,298 INFO L225 Difference]: With dead ends: 75 [2020-11-09 14:52:39,298 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 14:52:39,300 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 [2020-11-09 14:52:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 14:52:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 14:52:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 14:52:39,340 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 14:52:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:39,340 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 14:52:39,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 14:52:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 14:52:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 14:52:39,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:39,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:39,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 14:52:39,342 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 14:52:39,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:39,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041241344] [2020-11-09 14:52:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:39,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041241344] [2020-11-09 14:52:39,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:39,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 14:52:39,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1402272850] [2020-11-09 14:52:39,428 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:39,429 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:39,432 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-11-09 14:52:39,433 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:39,458 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:39,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 14:52:39,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 14:52:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 14:52:39,460 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 14:52:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:39,489 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 14:52:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 14:52:39,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 14:52:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:39,491 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:39,491 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:39,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 14:52:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 14:52:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 14:52:39,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 14:52:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 14:52:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 14:52:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 14:52:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 14:52:39,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:39,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:39,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 14:52:39,503 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:39,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 14:52:39,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942029126] [2020-11-09 14:52:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:39,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942029126] [2020-11-09 14:52:39,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:39,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 14:52:39,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712382427] [2020-11-09 14:52:39,581 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:39,582 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:39,585 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-11-09 14:52:39,585 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:39,593 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:39,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:39,611 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:39,611 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:39,631 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:39,631 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:39,644 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:39,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:39,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 14:52:39,646 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-11-09 14:52:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:39,745 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-11-09 14:52:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 14:52:39,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 14:52:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:39,747 INFO L225 Difference]: With dead ends: 66 [2020-11-09 14:52:39,747 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:39,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:39,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 14:52:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 14:52:39,755 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-11-09 14:52:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:39,755 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 14:52:39,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 14:52:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 14:52:39,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:39,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:39,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 14:52:39,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:39,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-11-09 14:52:39,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:39,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300868098] [2020-11-09 14:52:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300868098] [2020-11-09 14:52:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 14:52:39,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 14:52:39,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [694654950] [2020-11-09 14:52:39,825 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:39,826 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:39,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-11-09 14:52:39,828 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:39,846 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:39,846 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:39,886 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:39,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:39,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 14:52:39,888 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-11-09 14:52:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:39,974 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-11-09 14:52:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 14:52:39,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 14:52:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:39,977 INFO L225 Difference]: With dead ends: 67 [2020-11-09 14:52:39,977 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 14:52:39,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 14:52:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-11-09 14:52:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-09 14:52:39,986 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-11-09 14:52:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:39,986 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-09 14:52:39,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-09 14:52:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 14:52:39,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:39,987 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:39,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 14:52:39,988 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:39,988 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-11-09 14:52:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269504864] [2020-11-09 14:52:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269504864] [2020-11-09 14:52:40,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328841786] [2020-11-09 14:52:40,126 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:40,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 14:52:40,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 14:52:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:40,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:40,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 14:52:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [486103598] [2020-11-09 14:52:40,239 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:40,240 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:40,242 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-11-09 14:52:40,242 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:40,264 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:40,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 14:52:40,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:40,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 14:52:40,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:40,266 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-11-09 14:52:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:40,521 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 14:52:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:40,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 14:52:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:40,523 INFO L225 Difference]: With dead ends: 63 [2020-11-09 14:52:40,523 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 14:52:40,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 14:52:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 14:52:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 14:52:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 14:52:40,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 14:52:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:40,536 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 14:52:40,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 14:52:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 14:52:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 14:52:40,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:40,537 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:40,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:40,740 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:40,742 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-11-09 14:52:40,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:40,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231979136] [2020-11-09 14:52:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:40,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231979136] [2020-11-09 14:52:40,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582742332] [2020-11-09 14:52:40,809 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:40,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 14:52:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:40,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:40,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:40,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 14:52:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1154038568] [2020-11-09 14:52:40,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:40,972 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:40,975 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-11-09 14:52:40,975 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,020 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:41,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 14:52:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 14:52:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 14:52:41,021 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-11-09 14:52:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:41,154 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 14:52:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 14:52:41,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-11-09 14:52:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:41,157 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:41,157 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 14:52:41,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 14:52:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 14:52:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 14:52:41,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 14:52:41,173 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 14:52:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:41,173 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 14:52:41,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 14:52:41,174 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 14:52:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:41,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:41,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:41,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:41,375 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:41,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-11-09 14:52:41,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:41,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450615134] [2020-11-09 14:52:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450615134] [2020-11-09 14:52:41,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616643240] [2020-11-09 14:52:41,521 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:41,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:41,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 14:52:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:41,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:41,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:41,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 14:52:41,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24498818] [2020-11-09 14:52:41,607 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:41,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:41,611 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-11-09 14:52:41,611 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:41,613 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,613 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,634 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,651 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:41,651 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:41,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:41,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:41,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:41,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:41,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:41,666 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-11-09 14:52:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:41,794 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 14:52:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:41,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 14:52:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:41,796 INFO L225 Difference]: With dead ends: 56 [2020-11-09 14:52:41,796 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 14:52:41,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 14:52:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-09 14:52:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 14:52:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-09 14:52:41,801 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-11-09 14:52:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:41,802 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-09 14:52:41,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-09 14:52:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:41,803 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:41,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:42,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,015 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-11-09 14:52:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:42,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785422496] [2020-11-09 14:52:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:42,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785422496] [2020-11-09 14:52:42,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174284614] [2020-11-09 14:52:42,110 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 14:52:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 14:52:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:42,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:42,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:42,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 14:52:42,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [934812244] [2020-11-09 14:52:42,228 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:42,230 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:42,232 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-11-09 14:52:42,232 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:42,243 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:42,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 14:52:42,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 14:52:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 14:52:42,244 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-11-09 14:52:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:42,433 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 14:52:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 14:52:42,434 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 14:52:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:42,435 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:42,436 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 14:52:42,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:52:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 14:52:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-11-09 14:52:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 14:52:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 14:52:42,446 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-11-09 14:52:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:42,447 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 14:52:42,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 14:52:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 14:52:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 14:52:42,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:42,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:42,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,652 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-11-09 14:52:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:42,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106467922] [2020-11-09 14:52:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:42,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106467922] [2020-11-09 14:52:42,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426207427] [2020-11-09 14:52:42,756 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 14:52:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:42,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:42,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:42,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 14:52:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472733276] [2020-11-09 14:52:42,852 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:42,853 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:42,856 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-11-09 14:52:42,856 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:42,884 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:42,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:42,885 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-11-09 14:52:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:43,074 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 14:52:43,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 14:52:43,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 14:52:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:43,077 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:43,077 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 14:52:43,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 14:52:43,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-09 14:52:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-09 14:52:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-09 14:52:43,088 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-11-09 14:52:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:43,088 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-09 14:52:43,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-09 14:52:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 14:52:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:43,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:43,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,290 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:43,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-11-09 14:52:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:43,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873160606] [2020-11-09 14:52:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873160606] [2020-11-09 14:52:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052865136] [2020-11-09 14:52:43,359 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:43,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:43,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 14:52:43,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1230043618] [2020-11-09 14:52:43,458 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:43,459 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:43,462 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-11-09 14:52:43,462 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:43,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:43,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 14:52:43,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 14:52:43,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:43,484 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-11-09 14:52:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:43,705 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 14:52:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:43,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 14:52:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:43,707 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:43,707 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 14:52:43,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:52:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 14:52:43,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 14:52:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 14:52:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 14:52:43,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 14:52:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:43,713 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 14:52:43,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 14:52:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 14:52:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 14:52:43,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:43,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:43,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:43,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:43,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-11-09 14:52:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:43,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567528566] [2020-11-09 14:52:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567528566] [2020-11-09 14:52:44,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976006138] [2020-11-09 14:52:44,004 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 14:52:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:44,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 14:52:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:44,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:44,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:44,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 14:52:44,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [693675632] [2020-11-09 14:52:44,099 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:44,101 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:44,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-11-09 14:52:44,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:44,140 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:44,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 14:52:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 14:52:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 14:52:44,143 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 14:52:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:44,322 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 14:52:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 14:52:44,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-09 14:52:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:44,324 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:44,324 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 14:52:44,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:52:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 14:52:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 14:52:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 14:52:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 14:52:44,332 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 14:52:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:44,332 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 14:52:44,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 14:52:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 14:52:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:44,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:44,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,549 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-11-09 14:52:44,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:44,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406765381] [2020-11-09 14:52:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406765381] [2020-11-09 14:52:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150192755] [2020-11-09 14:52:44,671 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:44,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:44,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:44,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:44,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 14:52:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24982062] [2020-11-09 14:52:44,748 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:44,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:44,753 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-11-09 14:52:44,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:44,761 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:44,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:44,781 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:44,781 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:44,797 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:44,797 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:44,807 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:44,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:44,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:44,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:44,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:44,809 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-11-09 14:52:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:44,994 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 14:52:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 14:52:44,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 14:52:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:44,996 INFO L225 Difference]: With dead ends: 64 [2020-11-09 14:52:44,996 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 14:52:44,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:52:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 14:52:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-09 14:52:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 14:52:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-11-09 14:52:45,000 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-11-09 14:52:45,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:45,001 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-11-09 14:52:45,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-11-09 14:52:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:45,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:45,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:45,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 14:52:45,211 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:45,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:45,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-11-09 14:52:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:45,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276875991] [2020-11-09 14:52:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:45,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276875991] [2020-11-09 14:52:45,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611601297] [2020-11-09 14:52:45,334 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:45,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 14:52:45,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:45,408 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:45,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:45,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 14:52:45,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1986020789] [2020-11-09 14:52:45,423 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:45,424 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:45,427 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-11-09 14:52:45,427 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:45,453 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:45,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 14:52:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:45,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 14:52:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 14:52:45,455 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-11-09 14:52:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:45,756 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-11-09 14:52:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 14:52:45,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 14:52:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:45,759 INFO L225 Difference]: With dead ends: 74 [2020-11-09 14:52:45,759 INFO L226 Difference]: Without dead ends: 69 [2020-11-09 14:52:45,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:52:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-09 14:52:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-11-09 14:52:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 14:52:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-11-09 14:52:45,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-11-09 14:52:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:45,763 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-11-09 14:52:45,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 14:52:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-11-09 14:52:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 14:52:45,764 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:45,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:45,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:45,975 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-11-09 14:52:45,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:45,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332150917] [2020-11-09 14:52:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332150917] [2020-11-09 14:52:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901979712] [2020-11-09 14:52:46,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 14:52:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 14:52:46,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:46,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:46,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:46,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 14:52:46,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875371779] [2020-11-09 14:52:46,207 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:46,209 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:46,212 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-11-09 14:52:46,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:46,262 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 14:52:46,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:46,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-09 14:52:46,264 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-11-09 14:52:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:46,530 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 14:52:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:46,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 14:52:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:46,531 INFO L225 Difference]: With dead ends: 82 [2020-11-09 14:52:46,532 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 14:52:46,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:52:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 14:52:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-09 14:52:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 14:52:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-11-09 14:52:46,537 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-11-09 14:52:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:46,537 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-11-09 14:52:46,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-11-09 14:52:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 14:52:46,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:46,538 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:46,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,751 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-11-09 14:52:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065979051] [2020-11-09 14:52:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:46,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065979051] [2020-11-09 14:52:46,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32055841] [2020-11-09 14:52:46,838 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:46,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:46,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:46,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 14:52:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337707819] [2020-11-09 14:52:46,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:46,922 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:46,928 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-11-09 14:52:46,928 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:46,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:46,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 14:52:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 14:52:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:46,951 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-11-09 14:52:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:47,309 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 14:52:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:52:47,309 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 14:52:47,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:47,310 INFO L225 Difference]: With dead ends: 82 [2020-11-09 14:52:47,310 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 14:52:47,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:52:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 14:52:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 14:52:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 14:52:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 14:52:47,320 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 14:52:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:47,320 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 14:52:47,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 14:52:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 14:52:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 14:52:47,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:47,321 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:47,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 14:52:47,522 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:47,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-11-09 14:52:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:47,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35487685] [2020-11-09 14:52:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:47,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35487685] [2020-11-09 14:52:47,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649108457] [2020-11-09 14:52:47,615 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:47,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:47,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 14:52:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:47,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:47,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:47,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 14:52:47,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1577311829] [2020-11-09 14:52:47,704 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:47,706 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:47,709 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-11-09 14:52:47,709 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:47,725 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:47,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 14:52:47,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 14:52:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 14:52:47,726 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 14:52:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:47,987 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 14:52:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 14:52:47,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-09 14:52:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:47,988 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:47,988 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 14:52:47,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:52:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 14:52:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 14:52:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 14:52:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 14:52:47,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 14:52:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:47,993 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 14:52:47,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 14:52:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 14:52:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:47,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:47,993 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:48,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 14:52:48,202 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-11-09 14:52:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:48,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022234889] [2020-11-09 14:52:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:48,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022234889] [2020-11-09 14:52:48,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970708682] [2020-11-09 14:52:48,325 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 [2020-11-09 14:52:48,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 14:52:48,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:48,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:48,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:48,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 14:52:48,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1956879681] [2020-11-09 14:52:48,396 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:48,398 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:48,401 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-11-09 14:52:48,401 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:48,409 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:48,409 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:48,453 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:48,453 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:48,468 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:48,468 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:48,479 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:48,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:48,480 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-11-09 14:52:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:48,720 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 14:52:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 14:52:48,720 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 14:52:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:48,721 INFO L225 Difference]: With dead ends: 72 [2020-11-09 14:52:48,722 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 14:52:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:52:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 14:52:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-09 14:52:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 14:52:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-11-09 14:52:48,726 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-11-09 14:52:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:48,726 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-11-09 14:52:48,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-11-09 14:52:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:48,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:48,727 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:48,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 14:52:48,933 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-11-09 14:52:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:48,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599832815] [2020-11-09 14:52:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:49,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599832815] [2020-11-09 14:52:49,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188682424] [2020-11-09 14:52:49,022 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 [2020-11-09 14:52:49,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:49,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:49,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 14:52:49,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:49,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:49,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 14:52:49,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1831021997] [2020-11-09 14:52:49,121 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:49,122 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:49,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-11-09 14:52:49,125 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:49,131 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:49,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 14:52:49,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:49,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 14:52:49,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 14:52:49,132 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-11-09 14:52:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:49,461 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-11-09 14:52:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 14:52:49,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 14:52:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:49,462 INFO L225 Difference]: With dead ends: 84 [2020-11-09 14:52:49,462 INFO L226 Difference]: Without dead ends: 79 [2020-11-09 14:52:49,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:52:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-09 14:52:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-11-09 14:52:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 14:52:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-11-09 14:52:49,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-11-09 14:52:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:49,467 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-11-09 14:52:49,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 14:52:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-11-09 14:52:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 14:52:49,467 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:49,467 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:49,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:49,677 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-11-09 14:52:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:49,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70179517] [2020-11-09 14:52:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:49,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70179517] [2020-11-09 14:52:49,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741626338] [2020-11-09 14:52:49,761 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 [2020-11-09 14:52:49,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 14:52:49,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 14:52:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:49,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:49,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:49,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 14:52:49,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [785813287] [2020-11-09 14:52:49,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:49,871 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:49,874 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-11-09 14:52:49,874 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:49,910 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:49,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-09 14:52:49,911 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-11-09 14:52:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:50,300 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 14:52:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:52:50,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 14:52:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:50,301 INFO L225 Difference]: With dead ends: 92 [2020-11-09 14:52:50,301 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:50,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:52:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-11-09 14:52:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-09 14:52:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-11-09 14:52:50,307 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-11-09 14:52:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:50,308 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-11-09 14:52:50,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-11-09 14:52:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 14:52:50,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:50,309 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:50,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:50,510 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-11-09 14:52:50,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:50,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775526873] [2020-11-09 14:52:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775526873] [2020-11-09 14:52:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709398174] [2020-11-09 14:52:50,611 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 [2020-11-09 14:52:50,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-09 14:52:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:50,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:50,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:50,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 14:52:50,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994448692] [2020-11-09 14:52:50,759 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:50,761 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:50,764 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-11-09 14:52:50,765 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:50,788 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 14:52:50,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 14:52:50,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 14:52:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:50,791 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-11-09 14:52:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:51,190 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 14:52:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:52:51,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 14:52:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:51,191 INFO L225 Difference]: With dead ends: 92 [2020-11-09 14:52:51,191 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:51,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:52:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 14:52:51,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 14:52:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 14:52:51,198 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 14:52:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:51,199 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 14:52:51,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 14:52:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 14:52:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 14:52:51,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:51,200 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:51,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:51,413 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-11-09 14:52:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:51,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738324766] [2020-11-09 14:52:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738324766] [2020-11-09 14:52:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383042839] [2020-11-09 14:52:51,513 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 [2020-11-09 14:52:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:51,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 14:52:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:51,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:51,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:51,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 14:52:51,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1606789089] [2020-11-09 14:52:51,605 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:51,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:51,611 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-11-09 14:52:51,611 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:51,630 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:51,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 14:52:51,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:51,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 14:52:51,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 14:52:51,631 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 14:52:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:52,032 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 14:52:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 14:52:52,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-09 14:52:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:52,034 INFO L225 Difference]: With dead ends: 80 [2020-11-09 14:52:52,034 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 14:52:52,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:52:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 14:52:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 14:52:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 14:52:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 14:52:52,037 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 14:52:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:52,038 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 14:52:52,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 14:52:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 14:52:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:52,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:52,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:52,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 14:52:52,239 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-11-09 14:52:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581439332] [2020-11-09 14:52:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:52,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581439332] [2020-11-09 14:52:52,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618765186] [2020-11-09 14:52:52,369 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 [2020-11-09 14:52:52,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:52,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:52,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:52,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:52,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 14:52:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896369262] [2020-11-09 14:52:52,438 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:52,440 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:52,443 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-11-09 14:52:52,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:52,449 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:52,449 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:52,468 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:52,468 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:52,482 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:52,482 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:52,493 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:52,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:52,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:52,494 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-11-09 14:52:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:52,774 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 14:52:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 14:52:52,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 14:52:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:52,776 INFO L225 Difference]: With dead ends: 80 [2020-11-09 14:52:52,776 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 14:52:52,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:52:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 14:52:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-11-09 14:52:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 14:52:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-09 14:52:52,780 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-11-09 14:52:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:52,780 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-09 14:52:52,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-09 14:52:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:52,781 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:52,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 14:52:52,991 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-11-09 14:52:52,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:52,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121541507] [2020-11-09 14:52:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:53,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121541507] [2020-11-09 14:52:53,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055316250] [2020-11-09 14:52:53,145 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 [2020-11-09 14:52:53,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 14:52:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 14:52:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:53,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:53,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:53,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 14:52:53,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1343430482] [2020-11-09 14:52:53,260 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:53,262 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:53,265 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-11-09 14:52:53,265 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:53,271 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:53,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 14:52:53,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 14:52:53,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 14:52:53,272 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-11-09 14:52:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:53,777 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-11-09 14:52:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 14:52:53,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 14:52:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:53,778 INFO L225 Difference]: With dead ends: 94 [2020-11-09 14:52:53,778 INFO L226 Difference]: Without dead ends: 89 [2020-11-09 14:52:53,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:52:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-09 14:52:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-11-09 14:52:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 14:52:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-11-09 14:52:53,783 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-11-09 14:52:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:53,783 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-11-09 14:52:53,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 14:52:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-11-09 14:52:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 14:52:53,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:53,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:53,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 14:52:53,993 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-11-09 14:52:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:53,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655530614] [2020-11-09 14:52:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655530614] [2020-11-09 14:52:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608331755] [2020-11-09 14:52:54,089 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 [2020-11-09 14:52:54,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:52:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:54,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 14:52:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:54,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:54,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:54,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 14:52:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16878880] [2020-11-09 14:52:54,203 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:54,204 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:54,209 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-11-09 14:52:54,209 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:54,236 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 14:52:54,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:54,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:54,237 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-11-09 14:52:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:54,738 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 14:52:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:52:54,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 14:52:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:54,739 INFO L225 Difference]: With dead ends: 102 [2020-11-09 14:52:54,739 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 14:52:54,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:52:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 14:52:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-11-09 14:52:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 14:52:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-11-09 14:52:54,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-11-09 14:52:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:54,744 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-11-09 14:52:54,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-11-09 14:52:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 14:52:54,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:54,745 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:54,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 14:52:54,954 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-11-09 14:52:54,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:54,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133664938] [2020-11-09 14:52:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:55,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133664938] [2020-11-09 14:52:55,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419980686] [2020-11-09 14:52:55,086 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 [2020-11-09 14:52:55,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-09 14:52:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:55,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:52:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:55,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:55,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 14:52:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [660727067] [2020-11-09 14:52:55,174 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:55,176 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:55,180 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-11-09 14:52:55,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:55,198 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:55,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 14:52:55,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:55,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 14:52:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:55,199 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-11-09 14:52:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:55,771 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 14:52:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:52:55,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 14:52:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:55,773 INFO L225 Difference]: With dead ends: 102 [2020-11-09 14:52:55,773 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 14:52:55,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:52:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 14:52:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 14:52:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 14:52:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 14:52:55,776 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 14:52:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:55,777 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 14:52:55,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 14:52:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 14:52:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 14:52:55,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:55,777 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:55,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 14:52:55,985 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:55,986 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-11-09 14:52:55,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:55,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102813649] [2020-11-09 14:52:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:56,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102813649] [2020-11-09 14:52:56,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403436324] [2020-11-09 14:52:56,096 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 [2020-11-09 14:52:56,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 14:52:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 14:52:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:56,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:56,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:56,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 14:52:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1905813744] [2020-11-09 14:52:56,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:56,206 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:56,209 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-11-09 14:52:56,210 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:56,221 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:56,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 14:52:56,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 14:52:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 14:52:56,222 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 14:52:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:56,774 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 14:52:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 14:52:56,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-11-09 14:52:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:56,775 INFO L225 Difference]: With dead ends: 88 [2020-11-09 14:52:56,775 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 14:52:56,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:52:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 14:52:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 14:52:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 14:52:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 14:52:56,780 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 14:52:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:56,780 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 14:52:56,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 14:52:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 14:52:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:52:56,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:56,781 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:56,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:56,992 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-11-09 14:52:56,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:56,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224213252] [2020-11-09 14:52:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224213252] [2020-11-09 14:52:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62823589] [2020-11-09 14:52:57,157 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 [2020-11-09 14:52:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:52:57,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:57,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:57,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:57,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 14:52:57,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1548143137] [2020-11-09 14:52:57,221 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:57,223 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:57,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-11-09 14:52:57,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:57,229 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:57,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:57,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:57,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:57,279 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:52:57,279 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:52:57,293 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:52:57,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:52:57,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:52:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:57,294 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-11-09 14:52:57,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:57,665 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 14:52:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 14:52:57,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 14:52:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:57,666 INFO L225 Difference]: With dead ends: 88 [2020-11-09 14:52:57,666 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 14:52:57,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:52:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 14:52:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-11-09 14:52:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 14:52:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-11-09 14:52:57,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-11-09 14:52:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:57,670 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-11-09 14:52:57,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:52:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-11-09 14:52:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:52:57,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:57,671 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:57,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-09 14:52:57,881 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-11-09 14:52:57,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:57,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242606565] [2020-11-09 14:52:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:58,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242606565] [2020-11-09 14:52:58,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826849388] [2020-11-09 14:52:58,007 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 [2020-11-09 14:52:58,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:52:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 14:52:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:58,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:52:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:58,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:58,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 14:52:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [798961493] [2020-11-09 14:52:58,106 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:58,108 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:58,111 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-11-09 14:52:58,112 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:58,117 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:52:58,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 14:52:58,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 14:52:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 14:52:58,118 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-11-09 14:52:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:58,741 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-11-09 14:52:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 14:52:58,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 14:52:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:58,744 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:52:58,744 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 14:52:58,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:52:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 14:52:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-11-09 14:52:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 14:52:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-11-09 14:52:58,748 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-11-09 14:52:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:58,748 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-11-09 14:52:58,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 14:52:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-11-09 14:52:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 14:52:58,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:58,749 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:52:58,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:58,949 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:52:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:52:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-11-09 14:52:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:52:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935344951] [2020-11-09 14:52:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:52:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:52:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935344951] [2020-11-09 14:52:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236854946] [2020-11-09 14:52:59,068 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:52:59,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 14:52:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:52:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:52:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:52:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:52:59,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:52:59,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 14:52:59,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1837433221] [2020-11-09 14:52:59,198 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:52:59,200 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:52:59,205 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-11-09 14:52:59,205 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:52:59,233 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:52:59,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:52:59,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:52:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:52:59,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:52:59,235 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-11-09 14:52:59,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:52:59,808 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 14:52:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:52:59,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 14:52:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:52:59,809 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:52:59,809 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 14:52:59,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:52:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 14:52:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-11-09 14:52:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-09 14:52:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-11-09 14:52:59,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-11-09 14:52:59,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:52:59,815 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-11-09 14:52:59,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:52:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-11-09 14:52:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 14:52:59,816 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:52:59,816 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:00,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 14:53:00,021 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-11-09 14:53:00,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:00,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8503072] [2020-11-09 14:53:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8503072] [2020-11-09 14:53:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810261344] [2020-11-09 14:53:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:00,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:00,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:53:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:00,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:00,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:00,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 14:53:00,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131292461] [2020-11-09 14:53:00,272 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:00,275 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:00,278 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-11-09 14:53:00,278 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:00,301 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 14:53:00,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 14:53:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 14:53:00,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:00,302 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-11-09 14:53:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:00,995 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 14:53:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:00,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 14:53:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:00,996 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:00,996 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 14:53:00,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 14:53:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 14:53:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 14:53:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 14:53:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 14:53:01,004 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 14:53:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:01,004 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 14:53:01,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 14:53:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 14:53:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 14:53:01,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:01,005 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:01,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:01,214 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:01,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-11-09 14:53:01,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:01,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487810086] [2020-11-09 14:53:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:01,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487810086] [2020-11-09 14:53:01,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776357392] [2020-11-09 14:53:01,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:01,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 14:53:01,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 14:53:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:01,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:01,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:01,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 14:53:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2067163579] [2020-11-09 14:53:01,477 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:01,479 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:01,483 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-11-09 14:53:01,483 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:01,504 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:01,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 14:53:01,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 14:53:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 14:53:01,505 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 14:53:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:02,141 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 14:53:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 14:53:02,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-11-09 14:53:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:02,145 INFO L225 Difference]: With dead ends: 96 [2020-11-09 14:53:02,145 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 14:53:02,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:53:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 14:53:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 14:53:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 14:53:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 14:53:02,149 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 14:53:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:02,149 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 14:53:02,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 14:53:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 14:53:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:02,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:02,150 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:02,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-09 14:53:02,359 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-11-09 14:53:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478968547] [2020-11-09 14:53:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:02,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478968547] [2020-11-09 14:53:02,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479155618] [2020-11-09 14:53:02,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:02,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 14:53:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 14:53:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:02,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:02,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:02,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 14:53:02,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1121937442] [2020-11-09 14:53:02,661 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:02,663 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:02,668 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-11-09 14:53:02,669 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:02,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:02,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:02,699 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:02,700 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:02,718 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:02,718 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:02,733 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:02,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:02,735 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-11-09 14:53:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:03,120 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 14:53:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 14:53:03,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 14:53:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:03,125 INFO L225 Difference]: With dead ends: 96 [2020-11-09 14:53:03,125 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 14:53:03,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:53:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 14:53:03,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-09 14:53:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 14:53:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-11-09 14:53:03,130 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-11-09 14:53:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:03,130 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-11-09 14:53:03,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-11-09 14:53:03,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:03,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:03,133 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:03,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:03,334 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-11-09 14:53:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:03,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130469909] [2020-11-09 14:53:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:03,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130469909] [2020-11-09 14:53:03,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919074642] [2020-11-09 14:53:03,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 14:53:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:03,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:03,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:03,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 14:53:03,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [272803346] [2020-11-09 14:53:03,616 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:03,619 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:03,623 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-11-09 14:53:03,623 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:03,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:03,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 14:53:03,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:03,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 14:53:03,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 14:53:03,628 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-11-09 14:53:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:04,361 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-11-09 14:53:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 14:53:04,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 14:53:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:04,362 INFO L225 Difference]: With dead ends: 114 [2020-11-09 14:53:04,362 INFO L226 Difference]: Without dead ends: 109 [2020-11-09 14:53:04,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 14:53:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-09 14:53:04,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-09 14:53:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-09 14:53:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-11-09 14:53:04,369 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-11-09 14:53:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:04,369 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-11-09 14:53:04,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 14:53:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-11-09 14:53:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 14:53:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:04,370 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:04,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-09 14:53:04,580 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:04,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-11-09 14:53:04,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:04,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380308608] [2020-11-09 14:53:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:04,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380308608] [2020-11-09 14:53:04,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742470884] [2020-11-09 14:53:04,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:04,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 14:53:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:04,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:04,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:04,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 14:53:04,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1436905325] [2020-11-09 14:53:04,858 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:04,865 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:04,878 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-11-09 14:53:04,879 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:04,916 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:04,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-11-09 14:53:04,917 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-11-09 14:53:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:05,683 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 14:53:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:05,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 14:53:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:05,686 INFO L225 Difference]: With dead ends: 122 [2020-11-09 14:53:05,687 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 14:53:05,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 14:53:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 14:53:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-11-09 14:53:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 14:53:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-11-09 14:53:05,691 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-11-09 14:53:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:05,692 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-11-09 14:53:05,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-11-09 14:53:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 14:53:05,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:05,692 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:05,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:05,899 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-11-09 14:53:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:05,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66240302] [2020-11-09 14:53:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66240302] [2020-11-09 14:53:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249712051] [2020-11-09 14:53:06,063 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:06,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-09 14:53:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:06,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:06,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 14:53:06,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49158183] [2020-11-09 14:53:06,199 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:06,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:06,206 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-11-09 14:53:06,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:06,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:06,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 14:53:06,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 14:53:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:06,232 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-11-09 14:53:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:07,088 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 14:53:07,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:53:07,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 14:53:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:07,089 INFO L225 Difference]: With dead ends: 122 [2020-11-09 14:53:07,090 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 14:53:07,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 14:53:07,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 14:53:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 14:53:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 14:53:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 14:53:07,094 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 14:53:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:07,094 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 14:53:07,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 14:53:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 14:53:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 14:53:07,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:07,099 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:07,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-09 14:53:07,309 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-11-09 14:53:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:07,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164449582] [2020-11-09 14:53:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:07,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164449582] [2020-11-09 14:53:07,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144540869] [2020-11-09 14:53:07,476 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:07,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 14:53:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:07,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:07,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:07,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 14:53:07,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2120355228] [2020-11-09 14:53:07,584 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:07,588 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:07,596 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-11-09 14:53:07,596 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:07,616 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:07,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 14:53:07,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 14:53:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 14:53:07,618 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 14:53:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:08,396 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 14:53:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 14:53:08,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-11-09 14:53:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:08,398 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:53:08,399 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 14:53:08,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 14:53:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 14:53:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 14:53:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 14:53:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 14:53:08,403 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 14:53:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:08,404 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 14:53:08,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 14:53:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 14:53:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:08,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:08,404 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:08,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 14:53:08,614 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:08,615 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-11-09 14:53:08,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:08,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400173415] [2020-11-09 14:53:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:08,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400173415] [2020-11-09 14:53:08,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977997781] [2020-11-09 14:53:08,893 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:08,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 14:53:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 14:53:08,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:08,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:08,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:08,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 14:53:08,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [494956308] [2020-11-09 14:53:08,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:08,972 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:08,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-11-09 14:53:08,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:08,979 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:08,979 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:09,006 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:09,006 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:09,025 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:09,025 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:09,041 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:09,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:09,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:09,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:09,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:09,042 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-11-09 14:53:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:09,535 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 14:53:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:53:09,536 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 14:53:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:09,537 INFO L225 Difference]: With dead ends: 104 [2020-11-09 14:53:09,537 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 14:53:09,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:53:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 14:53:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-09 14:53:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 14:53:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-11-09 14:53:09,542 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-11-09 14:53:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:09,542 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-11-09 14:53:09,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-11-09 14:53:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:09,543 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:09,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 14:53:09,752 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:09,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-11-09 14:53:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:09,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304772722] [2020-11-09 14:53:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:09,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304772722] [2020-11-09 14:53:09,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511604641] [2020-11-09 14:53:09,958 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:10,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 14:53:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:10,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:10,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:10,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 14:53:10,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [559847870] [2020-11-09 14:53:10,080 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:10,083 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:10,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-11-09 14:53:10,089 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:10,094 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:10,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 14:53:10,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 14:53:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 14:53:10,095 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-11-09 14:53:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:10,937 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-11-09 14:53:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 14:53:10,937 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 14:53:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:10,938 INFO L225 Difference]: With dead ends: 124 [2020-11-09 14:53:10,938 INFO L226 Difference]: Without dead ends: 119 [2020-11-09 14:53:10,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 14:53:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-09 14:53:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-11-09 14:53:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 14:53:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-11-09 14:53:10,943 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-11-09 14:53:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:10,943 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-11-09 14:53:10,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 14:53:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-11-09 14:53:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 14:53:10,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:10,944 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:11,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 14:53:11,152 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:11,153 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-11-09 14:53:11,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:11,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978849054] [2020-11-09 14:53:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978849054] [2020-11-09 14:53:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81853200] [2020-11-09 14:53:11,339 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:11,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 14:53:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:11,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:11,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:11,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 14:53:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1546536038] [2020-11-09 14:53:11,442 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:11,445 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:11,451 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-11-09 14:53:11,451 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:11,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:11,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:11,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:11,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:53:11,484 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-11-09 14:53:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:12,378 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 14:53:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:53:12,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 14:53:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:12,380 INFO L225 Difference]: With dead ends: 132 [2020-11-09 14:53:12,380 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:12,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 14:53:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-11-09 14:53:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-09 14:53:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-11-09 14:53:12,387 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-11-09 14:53:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:12,387 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-11-09 14:53:12,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-11-09 14:53:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 14:53:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:12,388 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:12,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 14:53:12,600 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-11-09 14:53:12,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:12,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245927746] [2020-11-09 14:53:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:12,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245927746] [2020-11-09 14:53:12,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596086776] [2020-11-09 14:53:12,793 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:12,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:12,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 14:53:12,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:12,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:12,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:12,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 14:53:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [435250780] [2020-11-09 14:53:12,895 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:12,898 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:12,904 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-11-09 14:53:12,904 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:12,927 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:12,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 14:53:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 14:53:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:12,928 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-11-09 14:53:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:13,860 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 14:53:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:53:13,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 14:53:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:13,862 INFO L225 Difference]: With dead ends: 132 [2020-11-09 14:53:13,862 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:13,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-11-09 14:53:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 14:53:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 14:53:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 14:53:13,867 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 14:53:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:13,867 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 14:53:13,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 14:53:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 14:53:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 14:53:13,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:13,868 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:14,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 14:53:14,078 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:14,078 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-11-09 14:53:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:14,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234948859] [2020-11-09 14:53:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:14,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234948859] [2020-11-09 14:53:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701244501] [2020-11-09 14:53:14,266 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:14,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 14:53:14,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:14,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 14:53:14,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:14,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:14,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:14,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 14:53:14,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [383317466] [2020-11-09 14:53:14,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:14,382 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:14,388 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-11-09 14:53:14,388 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:14,398 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:14,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 14:53:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 14:53:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 14:53:14,400 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 14:53:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:15,408 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 14:53:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 14:53:15,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-11-09 14:53:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:15,409 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:15,409 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 14:53:15,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 14:53:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 14:53:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 14:53:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 14:53:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 14:53:15,414 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 14:53:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:15,414 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 14:53:15,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 14:53:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 14:53:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:15,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:15,415 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:15,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 14:53:15,623 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:15,624 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-11-09 14:53:15,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:15,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238675347] [2020-11-09 14:53:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:15,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238675347] [2020-11-09 14:53:15,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359658764] [2020-11-09 14:53:15,934 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:15,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:15,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:16,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:16,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 14:53:16,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2075277492] [2020-11-09 14:53:16,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:16,017 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:16,042 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-11-09 14:53:16,043 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:16,048 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:16,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:16,076 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:16,076 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:16,097 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:16,097 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:16,118 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:16,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:16,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:16,119 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-11-09 14:53:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:16,619 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 14:53:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 14:53:16,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 14:53:16,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:16,621 INFO L225 Difference]: With dead ends: 112 [2020-11-09 14:53:16,621 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 14:53:16,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:53:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 14:53:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-11-09 14:53:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 14:53:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-11-09 14:53:16,626 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-11-09 14:53:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:16,626 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-11-09 14:53:16,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-11-09 14:53:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:16,627 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:16,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:16,836 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-11-09 14:53:16,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:16,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699141416] [2020-11-09 14:53:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699141416] [2020-11-09 14:53:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770445103] [2020-11-09 14:53:17,066 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:17,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 14:53:17,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:53:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:17,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:17,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:17,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 14:53:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2113004615] [2020-11-09 14:53:17,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:17,190 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:17,197 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-11-09 14:53:17,197 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:17,207 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:17,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 14:53:17,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:17,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 14:53:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 14:53:17,208 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-11-09 14:53:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:18,326 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-11-09 14:53:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 14:53:18,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 14:53:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:18,327 INFO L225 Difference]: With dead ends: 134 [2020-11-09 14:53:18,328 INFO L226 Difference]: Without dead ends: 129 [2020-11-09 14:53:18,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 14:53:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-09 14:53:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-11-09 14:53:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 14:53:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-11-09 14:53:18,332 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-11-09 14:53:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:18,332 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-11-09 14:53:18,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 14:53:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-11-09 14:53:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 14:53:18,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:18,333 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:18,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:18,544 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-11-09 14:53:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:18,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007866556] [2020-11-09 14:53:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:18,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007866556] [2020-11-09 14:53:18,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719215162] [2020-11-09 14:53:18,756 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:18,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 14:53:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:53:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:18,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:18,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:18,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 14:53:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521633360] [2020-11-09 14:53:18,864 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:18,867 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:18,874 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-11-09 14:53:18,874 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:18,902 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:18,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:18,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:18,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:53:18,904 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-11-09 14:53:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:19,885 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 14:53:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:53:19,886 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 14:53:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:19,887 INFO L225 Difference]: With dead ends: 142 [2020-11-09 14:53:19,887 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 14:53:19,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 14:53:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 14:53:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-11-09 14:53:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 14:53:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-11-09 14:53:19,892 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-11-09 14:53:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:19,892 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-11-09 14:53:19,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-11-09 14:53:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 14:53:19,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:19,893 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:20,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:20,102 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-11-09 14:53:20,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:20,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844896179] [2020-11-09 14:53:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844896179] [2020-11-09 14:53:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092799909] [2020-11-09 14:53:20,353 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:20,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:20,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:20,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:20,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 14:53:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261046144] [2020-11-09 14:53:20,474 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:20,478 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:20,486 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-11-09 14:53:20,486 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:20,512 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:20,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 14:53:20,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:20,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 14:53:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:20,514 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-11-09 14:53:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:21,692 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 14:53:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:53:21,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 14:53:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:21,694 INFO L225 Difference]: With dead ends: 142 [2020-11-09 14:53:21,694 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 14:53:21,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-11-09 14:53:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 14:53:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 14:53:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 14:53:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 14:53:21,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 14:53:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:21,698 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 14:53:21,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 14:53:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 14:53:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 14:53:21,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:21,699 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:21,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-09 14:53:21,907 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:21,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-11-09 14:53:21,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:21,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302241473] [2020-11-09 14:53:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:22,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302241473] [2020-11-09 14:53:22,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260904712] [2020-11-09 14:53:22,137 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:22,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 14:53:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:22,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:22,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:22,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 14:53:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1456521347] [2020-11-09 14:53:22,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:22,252 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:22,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-11-09 14:53:22,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:22,270 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:22,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:53:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:53:22,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:53:22,271 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 14:53:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:23,439 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 14:53:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 14:53:23,439 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-11-09 14:53:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:23,441 INFO L225 Difference]: With dead ends: 120 [2020-11-09 14:53:23,441 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 14:53:23,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 14:53:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 14:53:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 14:53:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 14:53:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 14:53:23,444 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 14:53:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:23,445 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 14:53:23,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:53:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 14:53:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:23,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:23,445 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:23,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:23,646 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:23,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-11-09 14:53:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:23,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613648488] [2020-11-09 14:53:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:24,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613648488] [2020-11-09 14:53:24,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709039787] [2020-11-09 14:53:24,014 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:24,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 14:53:24,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:24,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 14:53:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:24,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:24,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:24,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 14:53:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722785158] [2020-11-09 14:53:24,111 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:24,115 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:24,123 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-11-09 14:53:24,123 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:24,130 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:24,131 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:24,158 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:24,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:24,181 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:24,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:24,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:24,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:24,200 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-11-09 14:53:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:24,824 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 14:53:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 14:53:24,827 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 14:53:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:24,828 INFO L225 Difference]: With dead ends: 120 [2020-11-09 14:53:24,828 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 14:53:24,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 14:53:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 14:53:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-11-09 14:53:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 14:53:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-11-09 14:53:24,832 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-11-09 14:53:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:24,832 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-11-09 14:53:24,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-11-09 14:53:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:24,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:24,833 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:25,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:25,034 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-11-09 14:53:25,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:25,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97574345] [2020-11-09 14:53:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:25,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97574345] [2020-11-09 14:53:25,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421335803] [2020-11-09 14:53:25,295 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:25,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 14:53:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:25,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:25,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 14:53:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113270963] [2020-11-09 14:53:25,416 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:25,420 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:25,427 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-11-09 14:53:25,427 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:25,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:25,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 14:53:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 14:53:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 14:53:25,440 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-11-09 14:53:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:26,688 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-11-09 14:53:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 14:53:26,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 14:53:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:26,690 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:53:26,690 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 14:53:26,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 14:53:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 14:53:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-11-09 14:53:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-09 14:53:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-11-09 14:53:26,694 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-11-09 14:53:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:26,694 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-11-09 14:53:26,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 14:53:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-11-09 14:53:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 14:53:26,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:26,695 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:26,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 14:53:26,896 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-11-09 14:53:26,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:26,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638717667] [2020-11-09 14:53:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:27,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638717667] [2020-11-09 14:53:27,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117420041] [2020-11-09 14:53:27,142 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:27,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 14:53:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 14:53:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:27,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:27,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:27,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 14:53:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [401614458] [2020-11-09 14:53:27,269 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:27,273 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:27,281 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-11-09 14:53:27,282 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:27,312 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:27,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:27,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-11-09 14:53:27,313 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-11-09 14:53:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:28,558 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 14:53:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:53:28,559 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 14:53:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:28,560 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:53:28,560 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 14:53:28,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 14:53:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 14:53:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-11-09 14:53:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-09 14:53:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-11-09 14:53:28,565 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-11-09 14:53:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:28,565 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-11-09 14:53:28,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-11-09 14:53:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 14:53:28,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:28,566 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:28,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 14:53:28,770 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-11-09 14:53:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:28,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493695825] [2020-11-09 14:53:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:29,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493695825] [2020-11-09 14:53:29,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836928971] [2020-11-09 14:53:29,039 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:29,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 14:53:29,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:29,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 14:53:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:29,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:29,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:29,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 14:53:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1558691350] [2020-11-09 14:53:29,165 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:29,169 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:29,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-11-09 14:53:29,178 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:29,202 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:29,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 14:53:29,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:29,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 14:53:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:29,204 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-11-09 14:53:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:30,573 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 14:53:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 14:53:30,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 14:53:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:30,574 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:53:30,574 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 14:53:30,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-11-09 14:53:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 14:53:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 14:53:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 14:53:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 14:53:30,578 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 14:53:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:30,579 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 14:53:30,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 14:53:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 14:53:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 14:53:30,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:30,580 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:30,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 14:53:30,789 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:30,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-11-09 14:53:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:30,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738648250] [2020-11-09 14:53:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738648250] [2020-11-09 14:53:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429625834] [2020-11-09 14:53:31,067 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:31,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 14:53:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:31,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:31,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:31,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 14:53:31,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24528986] [2020-11-09 14:53:31,177 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:31,181 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:31,190 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-11-09 14:53:31,190 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:31,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:31,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 14:53:31,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 14:53:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 14:53:31,202 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 14:53:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:32,549 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 14:53:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 14:53:32,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-11-09 14:53:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:32,551 INFO L225 Difference]: With dead ends: 128 [2020-11-09 14:53:32,551 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 14:53:32,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 14:53:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 14:53:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 14:53:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 14:53:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 14:53:32,554 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 14:53:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:32,555 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 14:53:32,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 14:53:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 14:53:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:32,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:32,555 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:32,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:32,756 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-11-09 14:53:32,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:32,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127012826] [2020-11-09 14:53:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127012826] [2020-11-09 14:53:33,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171660016] [2020-11-09 14:53:33,180 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:33,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:33,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:33,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:33,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:33,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 14:53:33,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304451545] [2020-11-09 14:53:33,257 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:33,262 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:33,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-11-09 14:53:33,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:33,274 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:33,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:33,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:33,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:33,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:33,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:33,352 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:33,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:33,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:33,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:33,353 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-11-09 14:53:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:34,129 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 14:53:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 14:53:34,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 14:53:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:34,131 INFO L225 Difference]: With dead ends: 128 [2020-11-09 14:53:34,132 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 14:53:34,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 14:53:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 14:53:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-11-09 14:53:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 14:53:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-11-09 14:53:34,135 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-11-09 14:53:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:34,136 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-11-09 14:53:34,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-11-09 14:53:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:34,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:34,136 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:34,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:34,340 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-11-09 14:53:34,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:34,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802224929] [2020-11-09 14:53:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:34,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802224929] [2020-11-09 14:53:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965282192] [2020-11-09 14:53:34,620 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:34,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 14:53:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:34,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 14:53:34,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:34,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:34,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:34,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 14:53:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1868637551] [2020-11-09 14:53:34,748 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:34,753 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:34,762 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-11-09 14:53:34,762 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:34,767 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:34,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 14:53:34,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 14:53:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 14:53:34,768 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-11-09 14:53:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:36,221 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-11-09 14:53:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 14:53:36,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 14:53:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:36,223 INFO L225 Difference]: With dead ends: 154 [2020-11-09 14:53:36,223 INFO L226 Difference]: Without dead ends: 149 [2020-11-09 14:53:36,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 14:53:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-09 14:53:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-11-09 14:53:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 14:53:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-11-09 14:53:36,226 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-11-09 14:53:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:36,227 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-11-09 14:53:36,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 14:53:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-11-09 14:53:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 14:53:36,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:36,227 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:36,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-09 14:53:36,428 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-11-09 14:53:36,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:36,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723837058] [2020-11-09 14:53:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:36,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723837058] [2020-11-09 14:53:36,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287243474] [2020-11-09 14:53:36,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:36,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:36,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 14:53:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:36,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:36,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:36,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 14:53:36,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1274228989] [2020-11-09 14:53:36,852 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:36,856 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:36,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-11-09 14:53:36,863 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:36,899 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 14:53:36,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:53:36,901 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-11-09 14:53:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:38,406 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 14:53:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 14:53:38,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 14:53:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:38,408 INFO L225 Difference]: With dead ends: 162 [2020-11-09 14:53:38,408 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 14:53:38,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 14:53:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 14:53:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-11-09 14:53:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 14:53:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-11-09 14:53:38,412 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-11-09 14:53:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:38,412 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-11-09 14:53:38,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:38,412 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-11-09 14:53:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 14:53:38,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:38,413 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:38,619 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:38,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-11-09 14:53:38,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:38,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308332004] [2020-11-09 14:53:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:38,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308332004] [2020-11-09 14:53:38,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224791799] [2020-11-09 14:53:38,937 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:39,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-09 14:53:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:39,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:39,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:39,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 14:53:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [666199368] [2020-11-09 14:53:39,069 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:39,074 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:39,083 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-11-09 14:53:39,084 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:39,112 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:39,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 14:53:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:39,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 14:53:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:39,114 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-11-09 14:53:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:40,659 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 14:53:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 14:53:40,660 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 14:53:40,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:40,661 INFO L225 Difference]: With dead ends: 162 [2020-11-09 14:53:40,661 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 14:53:40,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-11-09 14:53:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 14:53:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 14:53:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 14:53:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 14:53:40,666 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 14:53:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:40,667 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 14:53:40,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 14:53:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 14:53:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 14:53:40,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:40,667 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:40,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-09 14:53:40,876 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-11-09 14:53:40,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:40,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682682369] [2020-11-09 14:53:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:41,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682682369] [2020-11-09 14:53:41,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897875645] [2020-11-09 14:53:41,177 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:41,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 14:53:41,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:41,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 14:53:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:41,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:41,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:41,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 14:53:41,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257708529] [2020-11-09 14:53:41,320 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:41,333 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:41,344 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-11-09 14:53:41,345 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:41,362 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:41,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 14:53:41,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 14:53:41,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 14:53:41,364 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 14:53:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:42,884 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 14:53:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 14:53:42,885 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-11-09 14:53:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:42,887 INFO L225 Difference]: With dead ends: 136 [2020-11-09 14:53:42,887 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 14:53:42,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 14:53:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 14:53:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 14:53:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 14:53:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 14:53:42,891 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 14:53:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:42,891 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 14:53:42,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 14:53:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 14:53:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:42,892 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:42,892 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:43,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 14:53:43,101 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-11-09 14:53:43,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:43,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000195500] [2020-11-09 14:53:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000195500] [2020-11-09 14:53:43,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082224224] [2020-11-09 14:53:43,602 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:43,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:43,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:43,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 14:53:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [343310627] [2020-11-09 14:53:43,690 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:43,695 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:43,705 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-11-09 14:53:43,705 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:43,711 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:43,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:43,739 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:43,740 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:43,769 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:43,770 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:43,794 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:43,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:43,796 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-11-09 14:53:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:44,680 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 14:53:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 14:53:44,681 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 14:53:44,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:44,682 INFO L225 Difference]: With dead ends: 136 [2020-11-09 14:53:44,682 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 14:53:44,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 14:53:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 14:53:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-11-09 14:53:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 14:53:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-11-09 14:53:44,686 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-11-09 14:53:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:44,686 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-11-09 14:53:44,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-11-09 14:53:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:44,687 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:44,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 14:53:44,889 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:44,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-11-09 14:53:44,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:44,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732754320] [2020-11-09 14:53:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732754320] [2020-11-09 14:53:45,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219177382] [2020-11-09 14:53:45,208 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:45,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 14:53:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:45,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:45,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:45,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 14:53:45,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [256649413] [2020-11-09 14:53:45,344 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:45,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:45,358 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-11-09 14:53:45,359 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:45,367 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:45,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 14:53:45,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 14:53:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 14:53:45,368 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-11-09 14:53:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:46,958 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-11-09 14:53:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 14:53:46,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 14:53:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:46,959 INFO L225 Difference]: With dead ends: 164 [2020-11-09 14:53:46,959 INFO L226 Difference]: Without dead ends: 159 [2020-11-09 14:53:46,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 14:53:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-09 14:53:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-11-09 14:53:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 14:53:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-11-09 14:53:46,963 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-11-09 14:53:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:46,964 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-11-09 14:53:46,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 14:53:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-11-09 14:53:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 14:53:46,964 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:46,964 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:47,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 14:53:47,173 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-11-09 14:53:47,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:47,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555640655] [2020-11-09 14:53:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:47,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555640655] [2020-11-09 14:53:47,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131149667] [2020-11-09 14:53:47,513 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 14:53:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:47,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:47,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 14:53:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1527414755] [2020-11-09 14:53:47,650 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:47,653 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:47,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-11-09 14:53:47,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:47,703 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:53:47,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:47,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:47,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:53:47,705 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-11-09 14:53:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:49,428 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 14:53:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 14:53:49,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 14:53:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:49,430 INFO L225 Difference]: With dead ends: 172 [2020-11-09 14:53:49,430 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:53:49,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-11-09 14:53:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:53:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-11-09 14:53:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-09 14:53:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-11-09 14:53:49,435 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-11-09 14:53:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:49,435 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-11-09 14:53:49,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-11-09 14:53:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 14:53:49,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:49,436 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:49,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:49,647 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:49,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-11-09 14:53:49,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:49,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100015694] [2020-11-09 14:53:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:50,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100015694] [2020-11-09 14:53:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442985268] [2020-11-09 14:53:50,009 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:50,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:53:50,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:50,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:53:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:50,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:50,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 14:53:50,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1643569663] [2020-11-09 14:53:50,152 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:50,157 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:50,168 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-11-09 14:53:50,168 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:50,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 14:53:50,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 14:53:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 14:53:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:53:50,196 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-11-09 14:53:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:52,033 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 14:53:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 14:53:52,034 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 14:53:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:52,035 INFO L225 Difference]: With dead ends: 172 [2020-11-09 14:53:52,035 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:53:52,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 14:53:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:53:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 14:53:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 14:53:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 14:53:52,038 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 14:53:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:52,038 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 14:53:52,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 14:53:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 14:53:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 14:53:52,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:52,039 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:52,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 14:53:52,240 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-11-09 14:53:52,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:52,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839208537] [2020-11-09 14:53:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:52,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839208537] [2020-11-09 14:53:52,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317162372] [2020-11-09 14:53:52,636 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:52,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 14:53:52,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 14:53:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:52,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:52,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:52,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 14:53:52,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1228249231] [2020-11-09 14:53:52,781 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:52,785 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:52,796 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-11-09 14:53:52,796 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:52,809 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:52,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 14:53:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 14:53:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 14:53:52,810 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 14:53:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:54,592 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 14:53:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 14:53:54,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-11-09 14:53:54,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:54,594 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:53:54,594 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 14:53:54,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 14:53:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 14:53:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 14:53:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 14:53:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 14:53:54,597 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 14:53:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:54,597 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 14:53:54,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 14:53:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 14:53:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:53:54,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:54,598 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:54,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:54,799 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-11-09 14:53:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:54,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60738989] [2020-11-09 14:53:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60738989] [2020-11-09 14:53:55,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602159725] [2020-11-09 14:53:55,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:55,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 14:53:55,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:53:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:55,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:55,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:55,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 14:53:55,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2095888031] [2020-11-09 14:53:55,439 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:55,444 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:55,455 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-11-09 14:53:55,456 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:55,467 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:55,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:55,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:55,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:55,528 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:53:55,528 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:53:55,550 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:53:55,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:53:55,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:53:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:53:55,551 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-11-09 14:53:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:56,430 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 14:53:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 14:53:56,431 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 14:53:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:56,432 INFO L225 Difference]: With dead ends: 144 [2020-11-09 14:53:56,432 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 14:53:56,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 14:53:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 14:53:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-11-09 14:53:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 14:53:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-11-09 14:53:56,438 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-11-09 14:53:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:56,438 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-11-09 14:53:56,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:53:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-11-09 14:53:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:53:56,439 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:56,439 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:56,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-09 14:53:56,648 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-11-09 14:53:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:56,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729426766] [2020-11-09 14:53:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:57,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729426766] [2020-11-09 14:53:57,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798164044] [2020-11-09 14:53:57,055 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 14:53:57,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:57,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:53:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:57,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:57,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 14:53:57,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [247145459] [2020-11-09 14:53:57,181 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:57,185 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:57,196 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-11-09 14:53:57,196 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:53:57,202 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:53:57,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 14:53:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:53:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 14:53:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 14:53:57,203 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-11-09 14:53:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:53:59,110 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-11-09 14:53:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 14:53:59,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 14:53:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:53:59,112 INFO L225 Difference]: With dead ends: 174 [2020-11-09 14:53:59,112 INFO L226 Difference]: Without dead ends: 169 [2020-11-09 14:53:59,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 14:53:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-09 14:53:59,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-11-09 14:53:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-09 14:53:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-11-09 14:53:59,118 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-11-09 14:53:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:53:59,118 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-11-09 14:53:59,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 14:53:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-11-09 14:53:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 14:53:59,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:53:59,119 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:53:59,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:59,331 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:53:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:53:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-11-09 14:53:59,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:53:59,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351870298] [2020-11-09 14:53:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:53:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:53:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:59,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351870298] [2020-11-09 14:53:59,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495549861] [2020-11-09 14:53:59,760 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:53:59,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:53:59,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:53:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:53:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:53:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:53:59,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:53:59,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 14:53:59,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [91102222] [2020-11-09 14:53:59,945 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:53:59,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:53:59,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-11-09 14:53:59,970 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:00,018 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:00,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:54:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:54:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-11-09 14:54:00,020 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-11-09 14:54:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:01,990 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 14:54:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 14:54:01,991 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 14:54:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:01,992 INFO L225 Difference]: With dead ends: 182 [2020-11-09 14:54:01,992 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 14:54:01,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 14:54:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 14:54:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-11-09 14:54:01,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 14:54:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-11-09 14:54:01,996 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-11-09 14:54:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:01,996 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-11-09 14:54:01,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:54:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-11-09 14:54:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 14:54:01,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:01,997 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:02,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-09 14:54:02,202 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:02,202 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-11-09 14:54:02,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:02,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466630844] [2020-11-09 14:54:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:02,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466630844] [2020-11-09 14:54:02,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547816949] [2020-11-09 14:54:02,637 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:02,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-09 14:54:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:02,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:02,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:02,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:02,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 14:54:02,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1001835436] [2020-11-09 14:54:02,778 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:02,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:02,791 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-11-09 14:54:02,791 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:02,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:02,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 14:54:02,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 14:54:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:02,827 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-11-09 14:54:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:04,933 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 14:54:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 14:54:04,934 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 14:54:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:04,935 INFO L225 Difference]: With dead ends: 182 [2020-11-09 14:54:04,935 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 14:54:04,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-11-09 14:54:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 14:54:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 14:54:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 14:54:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 14:54:04,939 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 14:54:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 14:54:04,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 14:54:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 14:54:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 14:54:04,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:04,940 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:05,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:05,150 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-11-09 14:54:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:05,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61771862] [2020-11-09 14:54:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:05,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61771862] [2020-11-09 14:54:05,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848526084] [2020-11-09 14:54:05,619 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:05,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 14:54:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:05,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:05,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:05,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 14:54:05,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907423656] [2020-11-09 14:54:05,754 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:05,758 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:05,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-11-09 14:54:05,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:05,779 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:05,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 14:54:05,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:05,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 14:54:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 14:54:05,780 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 14:54:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:07,879 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 14:54:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 14:54:07,879 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-11-09 14:54:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:07,881 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:54:07,881 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 14:54:07,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 14:54:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 14:54:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 14:54:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 14:54:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 14:54:07,885 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 14:54:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:07,885 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 14:54:07,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 14:54:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 14:54:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:07,885 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:08,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-09 14:54:08,086 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:08,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-11-09 14:54:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:08,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436325694] [2020-11-09 14:54:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:08,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436325694] [2020-11-09 14:54:08,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382344719] [2020-11-09 14:54:08,736 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:08,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 14:54:08,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:08,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 14:54:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:08,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:08,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:08,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 14:54:08,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790380718] [2020-11-09 14:54:08,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:08,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:08,852 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-11-09 14:54:08,852 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:08,865 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:08,865 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:08,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:08,904 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:08,940 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:08,940 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:08,968 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:54:08,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:08,969 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-11-09 14:54:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:10,106 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 14:54:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 14:54:10,107 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 14:54:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:10,109 INFO L225 Difference]: With dead ends: 152 [2020-11-09 14:54:10,109 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 14:54:10,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 14:54:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 14:54:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-11-09 14:54:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 14:54:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-11-09 14:54:10,112 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-11-09 14:54:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:10,112 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-11-09 14:54:10,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-11-09 14:54:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:10,112 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:10,113 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:10,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:10,315 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-11-09 14:54:10,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:10,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646767688] [2020-11-09 14:54:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646767688] [2020-11-09 14:54:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825537118] [2020-11-09 14:54:10,781 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:10,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 14:54:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:10,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:10,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:10,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 14:54:10,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [355226077] [2020-11-09 14:54:10,935 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:10,951 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:10,964 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-11-09 14:54:10,965 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:10,970 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:10,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 14:54:10,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 14:54:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 14:54:10,971 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-11-09 14:54:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:13,210 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-11-09 14:54:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 14:54:13,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 14:54:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:13,212 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:54:13,212 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 14:54:13,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 14:54:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 14:54:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-11-09 14:54:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 14:54:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-11-09 14:54:13,222 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-11-09 14:54:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:13,222 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-11-09 14:54:13,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 14:54:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-11-09 14:54:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 14:54:13,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:13,222 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:13,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-09 14:54:13,424 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-11-09 14:54:13,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:13,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130219142] [2020-11-09 14:54:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:13,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130219142] [2020-11-09 14:54:13,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798323630] [2020-11-09 14:54:13,907 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 14:54:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:14,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:14,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:14,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 14:54:14,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [354325501] [2020-11-09 14:54:14,034 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:14,039 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:14,051 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-11-09 14:54:14,051 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:14,088 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:14,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:14,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:14,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:14,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:54:14,089 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-11-09 14:54:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:16,400 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 14:54:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 14:54:16,400 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 14:54:16,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:16,402 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:54:16,402 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 14:54:16,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-11-09 14:54:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 14:54:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-11-09 14:54:16,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-09 14:54:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-11-09 14:54:16,407 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-11-09 14:54:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:16,407 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-11-09 14:54:16,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-11-09 14:54:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 14:54:16,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:16,408 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:16,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 14:54:16,618 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-11-09 14:54:16,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:16,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802610244] [2020-11-09 14:54:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:17,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802610244] [2020-11-09 14:54:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961707733] [2020-11-09 14:54:17,114 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:17,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 14:54:17,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:17,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:17,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 14:54:17,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1841407053] [2020-11-09 14:54:17,261 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:17,266 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:17,280 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-11-09 14:54:17,280 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:17,323 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:17,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 14:54:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 14:54:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:17,324 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-11-09 14:54:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:19,723 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 14:54:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 14:54:19,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 14:54:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:19,726 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:54:19,726 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 14:54:19,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-11-09 14:54:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 14:54:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 14:54:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 14:54:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 14:54:19,729 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 14:54:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:19,730 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 14:54:19,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 14:54:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 14:54:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 14:54:19,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:19,730 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:19,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 14:54:19,937 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:19,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-11-09 14:54:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:19,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49854975] [2020-11-09 14:54:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49854975] [2020-11-09 14:54:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798384326] [2020-11-09 14:54:20,472 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:20,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 14:54:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 14:54:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:20,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:20,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:20,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 14:54:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81080398] [2020-11-09 14:54:20,621 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:20,625 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:20,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-11-09 14:54:20,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:20,644 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:20,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 14:54:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 14:54:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 14:54:20,645 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 14:54:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:23,081 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 14:54:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 14:54:23,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-11-09 14:54:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:23,083 INFO L225 Difference]: With dead ends: 160 [2020-11-09 14:54:23,083 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 14:54:23,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 14:54:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 14:54:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 14:54:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 14:54:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 14:54:23,088 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 14:54:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:23,088 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 14:54:23,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 14:54:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 14:54:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:23,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:23,089 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:23,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:23,298 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-11-09 14:54:23,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:23,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781828097] [2020-11-09 14:54:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:24,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781828097] [2020-11-09 14:54:24,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581618975] [2020-11-09 14:54:24,018 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:24,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:24,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:24,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:24,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 14:54:24,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180561254] [2020-11-09 14:54:24,105 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:24,111 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:24,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-11-09 14:54:24,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:24,127 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:24,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:24,177 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:24,177 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:24,211 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:24,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:24,243 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:54:24,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:24,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:24,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:24,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:24,244 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-11-09 14:54:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:25,509 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 14:54:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 14:54:25,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 14:54:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:25,510 INFO L225 Difference]: With dead ends: 160 [2020-11-09 14:54:25,510 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 14:54:25,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 14:54:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 14:54:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-11-09 14:54:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 14:54:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-11-09 14:54:25,515 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-11-09 14:54:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:25,515 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-11-09 14:54:25,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-11-09 14:54:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:25,516 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:25,516 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:25,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:25,726 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-11-09 14:54:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:25,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827532744] [2020-11-09 14:54:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:26,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827532744] [2020-11-09 14:54:26,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756947770] [2020-11-09 14:54:26,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:26,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 14:54:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 14:54:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:26,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:26,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:26,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 14:54:26,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [959317225] [2020-11-09 14:54:26,437 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:26,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:26,457 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-11-09 14:54:26,457 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:26,462 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:26,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 14:54:26,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 14:54:26,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 14:54:26,464 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-11-09 14:54:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:28,932 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-11-09 14:54:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 14:54:28,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 14:54:28,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:28,935 INFO L225 Difference]: With dead ends: 194 [2020-11-09 14:54:28,935 INFO L226 Difference]: Without dead ends: 189 [2020-11-09 14:54:28,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 14:54:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-09 14:54:28,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-11-09 14:54:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 14:54:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-11-09 14:54:28,939 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-11-09 14:54:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:28,939 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-11-09 14:54:28,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 14:54:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-11-09 14:54:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 14:54:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:28,940 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:29,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:29,144 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-11-09 14:54:29,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:29,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466745231] [2020-11-09 14:54:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466745231] [2020-11-09 14:54:29,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483179938] [2020-11-09 14:54:29,722 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:29,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 14:54:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 14:54:29,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:29,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:29,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:29,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 14:54:29,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [95230407] [2020-11-09 14:54:29,867 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:29,873 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:29,887 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-11-09 14:54:29,887 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:29,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 14:54:29,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:29,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:29,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:54:29,932 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-11-09 14:54:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:32,522 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 14:54:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 14:54:32,523 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 14:54:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:32,524 INFO L225 Difference]: With dead ends: 202 [2020-11-09 14:54:32,524 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 14:54:32,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-11-09 14:54:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 14:54:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-11-09 14:54:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-09 14:54:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-11-09 14:54:32,529 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-11-09 14:54:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:32,529 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-11-09 14:54:32,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-11-09 14:54:32,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 14:54:32,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:32,530 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:32,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-09 14:54:32,742 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-11-09 14:54:32,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:32,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917415761] [2020-11-09 14:54:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:33,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917415761] [2020-11-09 14:54:33,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301491036] [2020-11-09 14:54:33,392 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:33,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:33,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:33,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 14:54:33,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58983506] [2020-11-09 14:54:33,527 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:33,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:33,545 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-11-09 14:54:33,545 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:33,581 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:33,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 14:54:33,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 14:54:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:33,582 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-11-09 14:54:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:36,273 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 14:54:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 14:54:36,274 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 14:54:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:36,276 INFO L225 Difference]: With dead ends: 202 [2020-11-09 14:54:36,276 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 14:54:36,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 14:54:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 14:54:36,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 14:54:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 14:54:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 14:54:36,280 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 14:54:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:36,280 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 14:54:36,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 14:54:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 14:54:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 14:54:36,281 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:36,281 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:36,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:36,492 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:36,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-11-09 14:54:36,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:36,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735154982] [2020-11-09 14:54:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:37,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735154982] [2020-11-09 14:54:37,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189879939] [2020-11-09 14:54:37,091 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:37,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:37,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 14:54:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:37,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:37,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:37,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 14:54:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [210563443] [2020-11-09 14:54:37,235 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:37,240 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:37,267 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-11-09 14:54:37,268 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:37,279 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:37,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 14:54:37,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:37,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 14:54:37,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 14:54:37,280 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 14:54:39,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:39,974 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 14:54:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 14:54:39,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-11-09 14:54:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:39,977 INFO L225 Difference]: With dead ends: 168 [2020-11-09 14:54:39,977 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 14:54:39,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 14:54:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 14:54:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 14:54:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 14:54:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 14:54:39,980 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 14:54:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:39,980 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 14:54:39,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 14:54:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 14:54:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:39,981 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:39,981 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:40,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:40,192 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-11-09 14:54:40,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:40,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380801801] [2020-11-09 14:54:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:41,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380801801] [2020-11-09 14:54:41,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037875443] [2020-11-09 14:54:41,022 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:41,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 14:54:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:54:41,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:41,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:41,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:41,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 14:54:41,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195667540] [2020-11-09 14:54:41,121 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:41,127 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:41,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-11-09 14:54:41,143 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:41,144 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:41,144 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:41,189 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:41,189 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:41,221 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:54:41,222 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:54:41,251 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:54:41,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:54:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:54:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:41,252 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-11-09 14:54:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:42,639 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 14:54:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 14:54:42,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 14:54:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:42,641 INFO L225 Difference]: With dead ends: 168 [2020-11-09 14:54:42,641 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 14:54:42,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 14:54:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 14:54:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-11-09 14:54:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 14:54:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-11-09 14:54:42,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-11-09 14:54:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:42,645 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-11-09 14:54:42,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:54:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-11-09 14:54:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:42,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:42,645 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:42,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:42,854 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-11-09 14:54:42,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:42,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096533005] [2020-11-09 14:54:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:43,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096533005] [2020-11-09 14:54:43,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10460503] [2020-11-09 14:54:43,499 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:43,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:54:43,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 14:54:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:43,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:43,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:43,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 14:54:43,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1963493879] [2020-11-09 14:54:43,643 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:43,649 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:43,664 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-11-09 14:54:43,665 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:43,672 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:43,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 14:54:43,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 14:54:43,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 14:54:43,674 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-11-09 14:54:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:46,509 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-11-09 14:54:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 14:54:46,509 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 14:54:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:46,510 INFO L225 Difference]: With dead ends: 204 [2020-11-09 14:54:46,510 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 14:54:46,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 14:54:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 14:54:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-11-09 14:54:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-09 14:54:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-11-09 14:54:46,513 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-11-09 14:54:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:46,513 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-11-09 14:54:46,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 14:54:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-11-09 14:54:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 14:54:46,514 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:46,514 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:46,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-09 14:54:46,715 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:46,715 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-11-09 14:54:46,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:46,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623027445] [2020-11-09 14:54:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:47,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623027445] [2020-11-09 14:54:47,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024876850] [2020-11-09 14:54:47,361 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:47,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 14:54:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:47,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 14:54:47,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:47,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:47,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:47,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 14:54:47,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404022371] [2020-11-09 14:54:47,514 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:47,517 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:47,548 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-11-09 14:54:47,548 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:47,594 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:54:47,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:54:47,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:54:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 14:54:47,595 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-11-09 14:54:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:50,491 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 14:54:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 14:54:50,492 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 14:54:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:50,494 INFO L225 Difference]: With dead ends: 212 [2020-11-09 14:54:50,494 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 14:54:50,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-11-09 14:54:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 14:54:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-09 14:54:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 14:54:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-11-09 14:54:50,498 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-11-09 14:54:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:50,498 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-11-09 14:54:50,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:54:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-11-09 14:54:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 14:54:50,499 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:50,499 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:50,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:50,699 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-11-09 14:54:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:50,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489232431] [2020-11-09 14:54:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:51,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489232431] [2020-11-09 14:54:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990222146] [2020-11-09 14:54:51,384 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:51,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-09 14:54:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:54:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:51,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:54:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:51,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:51,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 14:54:51,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760030864] [2020-11-09 14:54:51,542 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:51,546 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:51,558 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-11-09 14:54:51,558 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:51,596 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 14:54:51,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 14:54:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 14:54:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:54:51,597 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-11-09 14:54:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:54,645 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 14:54:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 14:54:54,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 14:54:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:54,647 INFO L225 Difference]: With dead ends: 212 [2020-11-09 14:54:54,647 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 14:54:54,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-11-09 14:54:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 14:54:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 14:54:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 14:54:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 14:54:54,651 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 14:54:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:54,651 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 14:54:54,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 14:54:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 14:54:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 14:54:54,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:54,651 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:54,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-09 14:54:54,853 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-11-09 14:54:54,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:54,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456320240] [2020-11-09 14:54:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:55,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456320240] [2020-11-09 14:54:55,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128222830] [2020-11-09 14:54:55,532 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 14:54:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:55,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:55,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:55,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 14:54:55,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1172710545] [2020-11-09 14:54:55,684 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:54:55,687 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:54:55,715 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-11-09 14:54:55,715 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:54:55,734 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:54:55,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 14:54:55,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:54:55,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 14:54:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 14:54:55,735 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 14:54:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:54:58,736 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 14:54:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 14:54:58,737 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-11-09 14:54:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:54:58,739 INFO L225 Difference]: With dead ends: 176 [2020-11-09 14:54:58,739 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 14:54:58,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 14:54:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 14:54:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 14:54:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 14:54:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 14:54:58,742 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 14:54:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:54:58,743 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 14:54:58,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 14:54:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 14:54:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:54:58,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:54:58,743 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:54:58,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:58,952 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:54:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:54:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-11-09 14:54:58,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:54:58,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563711959] [2020-11-09 14:54:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:54:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:54:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:59,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563711959] [2020-11-09 14:54:59,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581752545] [2020-11-09 14:54:59,905 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:54:59,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:54:59,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:54:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:54:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:54:59,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:54:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:54:59,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:54:59,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 14:54:59,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [254204540] [2020-11-09 14:55:00,000 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:00,005 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:00,023 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-11-09 14:55:00,023 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:00,024 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:00,024 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:00,076 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:00,076 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:00,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:00,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:00,153 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:55:00,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:00,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:00,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:00,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:55:00,154 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-11-09 14:55:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:01,729 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-09 14:55:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 14:55:01,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 14:55:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:01,731 INFO L225 Difference]: With dead ends: 176 [2020-11-09 14:55:01,732 INFO L226 Difference]: Without dead ends: 170 [2020-11-09 14:55:01,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 14:55:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-09 14:55:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-11-09 14:55:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 14:55:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-11-09 14:55:01,735 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-11-09 14:55:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:01,736 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-11-09 14:55:01,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-11-09 14:55:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:55:01,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:01,736 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:01,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:01,937 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-11-09 14:55:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:01,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421833708] [2020-11-09 14:55:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:02,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421833708] [2020-11-09 14:55:02,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850531441] [2020-11-09 14:55:02,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:02,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 14:55:02,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 14:55:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:02,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:02,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:02,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 14:55:02,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781835692] [2020-11-09 14:55:02,853 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:02,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:02,869 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-11-09 14:55:02,869 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:02,874 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:02,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 14:55:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 14:55:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 14:55:02,875 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-11-09 14:55:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:06,012 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-11-09 14:55:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 14:55:06,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-09 14:55:06,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:06,015 INFO L225 Difference]: With dead ends: 214 [2020-11-09 14:55:06,015 INFO L226 Difference]: Without dead ends: 209 [2020-11-09 14:55:06,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 14:55:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-09 14:55:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-11-09 14:55:06,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 14:55:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-11-09 14:55:06,019 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-11-09 14:55:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:06,019 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-11-09 14:55:06,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 14:55:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-11-09 14:55:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 14:55:06,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:06,020 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:06,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:06,222 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:06,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-11-09 14:55:06,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:06,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412020914] [2020-11-09 14:55:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:06,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412020914] [2020-11-09 14:55:06,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009372574] [2020-11-09 14:55:06,968 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:07,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:55:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 14:55:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:07,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:07,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:07,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 14:55:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1180935435] [2020-11-09 14:55:07,130 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:07,134 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:07,147 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-11-09 14:55:07,147 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:07,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:07,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:55:07,197 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-11-09 14:55:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:10,477 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 14:55:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 14:55:10,478 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 14:55:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:10,479 INFO L225 Difference]: With dead ends: 222 [2020-11-09 14:55:10,479 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 14:55:10,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-11-09 14:55:10,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 14:55:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-11-09 14:55:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-09 14:55:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-11-09 14:55:10,483 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-11-09 14:55:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:10,483 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-11-09 14:55:10,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-11-09 14:55:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 14:55:10,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:10,484 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:10,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:10,685 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:10,686 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-11-09 14:55:10,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:10,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930300955] [2020-11-09 14:55:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:11,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930300955] [2020-11-09 14:55:11,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677792538] [2020-11-09 14:55:11,471 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:11,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-09 14:55:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:11,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:55:11,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:11,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:11,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 14:55:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957180545] [2020-11-09 14:55:11,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:11,646 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:11,665 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-11-09 14:55:11,665 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:11,707 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:11,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 14:55:11,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:11,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 14:55:11,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:11,708 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-11-09 14:55:15,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:15,077 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 14:55:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 14:55:15,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 14:55:15,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:15,080 INFO L225 Difference]: With dead ends: 222 [2020-11-09 14:55:15,080 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 14:55:15,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-11-09 14:55:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 14:55:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-11-09 14:55:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 14:55:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 14:55:15,084 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-11-09 14:55:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:15,084 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 14:55:15,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 14:55:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 14:55:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 14:55:15,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:15,085 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:15,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:15,292 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-11-09 14:55:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:15,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324556938] [2020-11-09 14:55:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:16,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324556938] [2020-11-09 14:55:16,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656539180] [2020-11-09 14:55:16,076 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:16,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-09 14:55:16,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:16,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 14:55:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:16,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:16,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:16,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 14:55:16,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [818969183] [2020-11-09 14:55:16,246 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:16,251 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:16,270 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-11-09 14:55:16,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:16,287 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:16,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 14:55:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 14:55:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 14:55:16,288 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-11-09 14:55:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:19,663 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-11-09 14:55:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 14:55:19,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-11-09 14:55:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:19,665 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:55:19,665 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 14:55:19,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-11-09 14:55:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 14:55:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-11-09 14:55:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 14:55:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-09 14:55:19,669 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-09 14:55:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:19,669 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-09 14:55:19,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 14:55:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-09 14:55:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:19,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:19,670 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:19,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:19,881 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-11-09 14:55:19,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:19,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120896941] [2020-11-09 14:55:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120896941] [2020-11-09 14:55:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65177733] [2020-11-09 14:55:20,951 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:21,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:21,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:21,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-09 14:55:21,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92838781] [2020-11-09 14:55:21,044 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:21,050 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:21,070 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-11-09 14:55:21,070 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:21,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:21,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:21,124 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:21,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:21,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:21,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:21,205 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:55:21,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:21,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:21,206 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-11-09 14:55:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:22,986 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-09 14:55:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 14:55:22,987 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 14:55:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:22,988 INFO L225 Difference]: With dead ends: 184 [2020-11-09 14:55:22,988 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 14:55:22,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 14:55:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 14:55:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-11-09 14:55:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-09 14:55:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-11-09 14:55:22,992 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-11-09 14:55:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:22,993 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-11-09 14:55:22,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-11-09 14:55:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:22,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:22,993 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:23,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:23,194 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:23,195 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-11-09 14:55:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:23,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438459630] [2020-11-09 14:55:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:24,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438459630] [2020-11-09 14:55:24,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544265708] [2020-11-09 14:55:24,015 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:24,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:55:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 14:55:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:24,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:24,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:24,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 14:55:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1093899791] [2020-11-09 14:55:24,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:24,192 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:24,207 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-11-09 14:55:24,207 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:24,216 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:24,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 14:55:24,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 14:55:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 14:55:24,217 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-11-09 14:55:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:27,754 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-11-09 14:55:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 14:55:27,755 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-09 14:55:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:27,756 INFO L225 Difference]: With dead ends: 224 [2020-11-09 14:55:27,757 INFO L226 Difference]: Without dead ends: 219 [2020-11-09 14:55:27,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 14:55:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-09 14:55:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-11-09 14:55:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 14:55:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-11-09 14:55:27,760 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-11-09 14:55:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:27,760 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-11-09 14:55:27,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 14:55:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-11-09 14:55:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 14:55:27,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:27,761 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:27,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-09 14:55:27,961 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-11-09 14:55:27,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:27,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126008516] [2020-11-09 14:55:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:28,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126008516] [2020-11-09 14:55:28,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793204637] [2020-11-09 14:55:28,799 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:28,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-09 14:55:28,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 14:55:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:28,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:28,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:28,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 14:55:28,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [813729211] [2020-11-09 14:55:28,998 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:29,004 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:29,024 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-11-09 14:55:29,024 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:29,076 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 14:55:29,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:29,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:55:29,077 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-11-09 14:55:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:32,747 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 14:55:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 14:55:32,748 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 14:55:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:32,749 INFO L225 Difference]: With dead ends: 232 [2020-11-09 14:55:32,749 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 14:55:32,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-11-09 14:55:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 14:55:32,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-11-09 14:55:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-09 14:55:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-11-09 14:55:32,753 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-11-09 14:55:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:32,753 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-11-09 14:55:32,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-11-09 14:55:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 14:55:32,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:32,754 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:32,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:32,963 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:32,963 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-11-09 14:55:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:32,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802729800] [2020-11-09 14:55:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:33,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802729800] [2020-11-09 14:55:33,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615458560] [2020-11-09 14:55:33,836 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:33,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:55:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:33,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:33,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:33,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:55:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:34,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:34,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 14:55:34,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2042533147] [2020-11-09 14:55:34,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:34,011 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:34,032 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-11-09 14:55:34,032 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:34,079 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 14:55:34,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 14:55:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 14:55:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:34,080 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-11-09 14:55:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:37,870 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 14:55:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 14:55:37,870 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 14:55:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:37,872 INFO L225 Difference]: With dead ends: 232 [2020-11-09 14:55:37,872 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 14:55:37,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-11-09 14:55:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 14:55:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-11-09 14:55:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 14:55:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 14:55:37,875 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-11-09 14:55:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:37,875 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 14:55:37,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 14:55:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 14:55:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 14:55:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:37,876 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:38,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-09 14:55:38,085 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-11-09 14:55:38,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:38,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771153587] [2020-11-09 14:55:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:38,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771153587] [2020-11-09 14:55:38,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729676717] [2020-11-09 14:55:38,990 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:39,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-09 14:55:39,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 14:55:39,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:39,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:39,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:39,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 14:55:39,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [315003549] [2020-11-09 14:55:39,170 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:39,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:39,191 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-11-09 14:55:39,192 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:39,202 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:39,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 14:55:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 14:55:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 14:55:39,203 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-11-09 14:55:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:43,025 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-11-09 14:55:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 14:55:43,026 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-11-09 14:55:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:43,027 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:55:43,027 INFO L226 Difference]: Without dead ends: 187 [2020-11-09 14:55:43,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-11-09 14:55:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-09 14:55:43,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-11-09 14:55:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-09 14:55:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-09 14:55:43,031 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-09 14:55:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:43,031 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-09 14:55:43,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 14:55:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-09 14:55:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:55:43,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:43,032 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:43,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:43,233 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-11-09 14:55:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462221722] [2020-11-09 14:55:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:44,448 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:44,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462221722] [2020-11-09 14:55:44,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35771709] [2020-11-09 14:55:44,448 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:44,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-09 14:55:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 14:55:44,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:44,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:44,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:44,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-09 14:55:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690674246] [2020-11-09 14:55:44,583 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:44,589 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:44,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-11-09 14:55:44,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:44,613 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:44,613 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:44,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:44,705 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:44,749 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:55:44,749 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:55:44,791 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:55:44,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:55:44,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:55:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:44,792 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-11-09 14:55:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:46,746 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-09 14:55:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 14:55:46,747 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 14:55:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:46,748 INFO L225 Difference]: With dead ends: 192 [2020-11-09 14:55:46,749 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 14:55:46,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 14:55:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 14:55:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-11-09 14:55:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-09 14:55:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-11-09 14:55:46,755 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-11-09 14:55:46,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:46,755 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-11-09 14:55:46,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:55:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-11-09 14:55:46,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:55:46,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:46,756 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:46,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:46,967 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:46,967 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-11-09 14:55:46,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:46,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044884145] [2020-11-09 14:55:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044884145] [2020-11-09 14:55:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658288325] [2020-11-09 14:55:47,906 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 14:55:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:48,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:55:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:48,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:48,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 14:55:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [527869847] [2020-11-09 14:55:48,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:48,091 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:48,108 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-11-09 14:55:48,108 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:48,113 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:55:48,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 14:55:48,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 14:55:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 14:55:48,114 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. [2020-11-09 14:55:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:52,128 INFO L93 Difference]: Finished difference Result 234 states and 559 transitions. [2020-11-09 14:55:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 14:55:52,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-11-09 14:55:52,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:52,130 INFO L225 Difference]: With dead ends: 234 [2020-11-09 14:55:52,130 INFO L226 Difference]: Without dead ends: 229 [2020-11-09 14:55:52,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4436, Invalid=9844, Unknown=0, NotChecked=0, Total=14280 [2020-11-09 14:55:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-11-09 14:55:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 110. [2020-11-09 14:55:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-09 14:55:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2020-11-09 14:55:52,134 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 46 [2020-11-09 14:55:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:52,134 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2020-11-09 14:55:52,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 14:55:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2020-11-09 14:55:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 14:55:52,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:52,135 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:52,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:52,336 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 92 times [2020-11-09 14:55:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:52,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923527606] [2020-11-09 14:55:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:53,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923527606] [2020-11-09 14:55:53,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233935700] [2020-11-09 14:55:53,296 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:53,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:55:53,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 14:55:53,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:53,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:53,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 14:55:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1137896398] [2020-11-09 14:55:53,479 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:53,483 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:53,506 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 60 transitions. [2020-11-09 14:55:53,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:53,564 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45015#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 43))] [2020-11-09 14:55:53,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:55:53,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:53,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:55:53,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 14:55:53,565 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand 43 states. [2020-11-09 14:55:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:55:57,702 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 14:55:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 14:55:57,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 14:55:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:55:57,704 INFO L225 Difference]: With dead ends: 242 [2020-11-09 14:55:57,704 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 14:55:57,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4285, Invalid=9757, Unknown=0, NotChecked=0, Total=14042 [2020-11-09 14:55:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 14:55:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-11-09 14:55:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-09 14:55:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2020-11-09 14:55:57,710 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 46 [2020-11-09 14:55:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:55:57,711 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2020-11-09 14:55:57,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:55:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2020-11-09 14:55:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 14:55:57,711 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:55:57,711 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:55:57,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:57,921 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:55:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:55:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 93 times [2020-11-09 14:55:57,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:55:57,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455272086] [2020-11-09 14:55:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:55:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:55:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:58,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455272086] [2020-11-09 14:55:58,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479159084] [2020-11-09 14:55:58,928 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:55:59,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-09 14:55:59,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:55:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 14:55:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:55:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:55:59,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:55:59,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 14:55:59,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1060540012] [2020-11-09 14:55:59,112 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:55:59,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:55:59,134 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 57 transitions. [2020-11-09 14:55:59,134 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:55:59,180 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45890#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 14:55:59,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 14:55:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:55:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 14:55:59,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 14:55:59,181 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand 44 states. [2020-11-09 14:56:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:03,447 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-11-09 14:56:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-09 14:56:03,448 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-11-09 14:56:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:03,449 INFO L225 Difference]: With dead ends: 242 [2020-11-09 14:56:03,449 INFO L226 Difference]: Without dead ends: 233 [2020-11-09 14:56:03,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4504 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4702, Invalid=10550, Unknown=0, NotChecked=0, Total=15252 [2020-11-09 14:56:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-11-09 14:56:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-11-09 14:56:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 14:56:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-11-09 14:56:03,453 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-11-09 14:56:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:03,453 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-11-09 14:56:03,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 14:56:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-11-09 14:56:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-09 14:56:03,454 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:03,454 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:03,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-11-09 14:56:03,655 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 94 times [2020-11-09 14:56:03,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:03,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440583797] [2020-11-09 14:56:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440583797] [2020-11-09 14:56:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912373631] [2020-11-09 14:56:04,665 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:04,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 14:56:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 14:56:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:04,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:56:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:04,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:04,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-11-09 14:56:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1298420777] [2020-11-09 14:56:04,851 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:04,856 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:04,873 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 59 transitions. [2020-11-09 14:56:04,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:04,899 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:56:04,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 14:56:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 14:56:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-09 14:56:04,900 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-11-09 14:56:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:09,198 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-11-09 14:56:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-11-09 14:56:09,199 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-11-09 14:56:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:09,200 INFO L225 Difference]: With dead ends: 200 [2020-11-09 14:56:09,200 INFO L226 Difference]: Without dead ends: 195 [2020-11-09 14:56:09,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4464, Invalid=10056, Unknown=0, NotChecked=0, Total=14520 [2020-11-09 14:56:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-11-09 14:56:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-11-09 14:56:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-11-09 14:56:09,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-11-09 14:56:09,205 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-11-09 14:56:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:09,205 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-11-09 14:56:09,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 14:56:09,205 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-11-09 14:56:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 14:56:09,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:09,205 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:09,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:09,406 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 95 times [2020-11-09 14:56:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:09,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382999832] [2020-11-09 14:56:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382999832] [2020-11-09 14:56:10,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626853634] [2020-11-09 14:56:10,750 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:10,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-09 14:56:10,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-09 14:56:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:10,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:56:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:10,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:10,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2020-11-09 14:56:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [558927789] [2020-11-09 14:56:10,863 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:10,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:10,904 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 63 transitions. [2020-11-09 14:56:10,904 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:10,910 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:56:10,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:56:10,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:56:10,965 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:56:11,015 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 14:56:11,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 14:56:11,059 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47532#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-11-09 14:56:11,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-09 14:56:11,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:11,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-09 14:56:11,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 14:56:11,061 INFO L87 Difference]: Start difference. First operand 151 states and 393 transitions. Second operand 45 states. [2020-11-09 14:56:13,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:13,287 INFO L93 Difference]: Finished difference Result 200 states and 491 transitions. [2020-11-09 14:56:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 14:56:13,288 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-11-09 14:56:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:13,289 INFO L225 Difference]: With dead ends: 200 [2020-11-09 14:56:13,290 INFO L226 Difference]: Without dead ends: 194 [2020-11-09 14:56:13,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2320, Invalid=5162, Unknown=0, NotChecked=0, Total=7482 [2020-11-09 14:56:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-11-09 14:56:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 155. [2020-11-09 14:56:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-09 14:56:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 401 transitions. [2020-11-09 14:56:13,294 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 401 transitions. Word has length 48 [2020-11-09 14:56:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:13,294 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 401 transitions. [2020-11-09 14:56:13,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-09 14:56:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 401 transitions. [2020-11-09 14:56:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 14:56:13,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:13,295 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-09 14:56:13,496 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2130926905, now seen corresponding path program 96 times [2020-11-09 14:56:13,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:13,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563958833] [2020-11-09 14:56:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:14,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563958833] [2020-11-09 14:56:14,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326642725] [2020-11-09 14:56:14,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:14,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-11-09 14:56:14,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 14:56:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:14,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 14:56:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:14,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:14,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-09 14:56:14,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1820305063] [2020-11-09 14:56:14,771 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:14,775 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:14,797 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 56 transitions. [2020-11-09 14:56:14,797 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:14,808 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:56:14,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-09 14:56:14,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-09 14:56:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2020-11-09 14:56:14,809 INFO L87 Difference]: Start difference. First operand 155 states and 401 transitions. Second operand 44 states. [2020-11-09 14:56:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:19,251 INFO L93 Difference]: Finished difference Result 244 states and 583 transitions. [2020-11-09 14:56:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-09 14:56:19,253 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 48 [2020-11-09 14:56:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:19,255 INFO L225 Difference]: With dead ends: 244 [2020-11-09 14:56:19,255 INFO L226 Difference]: Without dead ends: 239 [2020-11-09 14:56:19,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4690 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4889, Invalid=10861, Unknown=0, NotChecked=0, Total=15750 [2020-11-09 14:56:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-11-09 14:56:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 114. [2020-11-09 14:56:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 14:56:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 279 transitions. [2020-11-09 14:56:19,260 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 279 transitions. Word has length 48 [2020-11-09 14:56:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:19,260 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 279 transitions. [2020-11-09 14:56:19,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-09 14:56:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 279 transitions. [2020-11-09 14:56:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-09 14:56:19,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:19,261 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:19,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:19,475 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 194284373, now seen corresponding path program 97 times [2020-11-09 14:56:19,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084647392] [2020-11-09 14:56:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:20,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084647392] [2020-11-09 14:56:20,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022713030] [2020-11-09 14:56:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-09 14:56:20,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:20,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 14:56:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:20,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 14:56:20,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-11-09 14:56:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80198372] [2020-11-09 14:56:20,717 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:20,722 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:20,764 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 62 transitions. [2020-11-09 14:56:20,764 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:20,827 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49133#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 45))] [2020-11-09 14:56:20,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-09 14:56:20,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-09 14:56:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=1597, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 14:56:20,828 INFO L87 Difference]: Start difference. First operand 114 states and 279 transitions. Second operand 45 states. [2020-11-09 14:56:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:25,474 INFO L93 Difference]: Finished difference Result 252 states and 601 transitions. [2020-11-09 14:56:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-11-09 14:56:25,475 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2020-11-09 14:56:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:25,477 INFO L225 Difference]: With dead ends: 252 [2020-11-09 14:56:25,477 INFO L226 Difference]: Without dead ends: 243 [2020-11-09 14:56:25,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4338 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4730, Invalid=10770, Unknown=0, NotChecked=0, Total=15500 [2020-11-09 14:56:25,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-11-09 14:56:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 156. [2020-11-09 14:56:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-09 14:56:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 405 transitions. [2020-11-09 14:56:25,481 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 405 transitions. Word has length 48 [2020-11-09 14:56:25,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:25,482 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 405 transitions. [2020-11-09 14:56:25,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-09 14:56:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 405 transitions. [2020-11-09 14:56:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-09 14:56:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:25,482 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:25,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:25,683 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1634249830, now seen corresponding path program 98 times [2020-11-09 14:56:25,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:25,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293659789] [2020-11-09 14:56:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:26,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293659789] [2020-11-09 14:56:26,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523762395] [2020-11-09 14:56:26,127 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:26,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 14:56:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:56:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:26,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 14:56:26,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2020-11-09 14:56:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257822011] [2020-11-09 14:56:26,239 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:26,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:26,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 59 transitions. [2020-11-09 14:56:26,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:26,289 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:56:26,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:56:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:26,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:56:26,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:56:26,290 INFO L87 Difference]: Start difference. First operand 156 states and 405 transitions. Second operand 23 states. [2020-11-09 14:56:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:26,361 INFO L93 Difference]: Finished difference Result 1394 states and 3528 transitions. [2020-11-09 14:56:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:56:26,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-11-09 14:56:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:26,362 INFO L225 Difference]: With dead ends: 1394 [2020-11-09 14:56:26,363 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 14:56:26,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:56:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 14:56:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-09 14:56:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 14:56:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 110 transitions. [2020-11-09 14:56:26,365 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 110 transitions. Word has length 49 [2020-11-09 14:56:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:26,365 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 110 transitions. [2020-11-09 14:56:26,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:56:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 110 transitions. [2020-11-09 14:56:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-09 14:56:26,365 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 14:56:26,365 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 14:56:26,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-09 14:56:26,573 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 14:56:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 14:56:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1727876365, now seen corresponding path program 99 times [2020-11-09 14:56:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 14:56:26,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192682579] [2020-11-09 14:56:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 14:56:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 14:56:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:26,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192682579] [2020-11-09 14:56:26,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081150974] [2020-11-09 14:56:26,973 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 14:56:27,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-11-09 14:56:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 14:56:27,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 14:56:27,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 14:56:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 14:56:27,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 14:56:27,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2020-11-09 14:56:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1212856599] [2020-11-09 14:56:27,091 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 14:56:27,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 14:56:27,131 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 61 transitions. [2020-11-09 14:56:27,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 14:56:27,158 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 14:56:27,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 14:56:27,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 14:56:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 14:56:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:56:27,159 INFO L87 Difference]: Start difference. First operand 66 states and 110 transitions. Second operand 23 states. [2020-11-09 14:56:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 14:56:27,221 INFO L93 Difference]: Finished difference Result 491 states and 724 transitions. [2020-11-09 14:56:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 14:56:27,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-11-09 14:56:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 14:56:27,223 INFO L225 Difference]: With dead ends: 491 [2020-11-09 14:56:27,223 INFO L226 Difference]: Without dead ends: 0 [2020-11-09 14:56:27,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-11-09 14:56:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-09 14:56:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-09 14:56:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-09 14:56:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-09 14:56:27,224 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-11-09 14:56:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 14:56:27,224 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-09 14:56:27,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 14:56:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-09 14:56:27,224 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-09 14:56:27,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-09 14:56:27,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 02:56:27 BasicIcfg [2020-11-09 14:56:27,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 14:56:27,430 INFO L168 Benchmark]: Toolchain (without parser) took 233483.39 ms. Allocated memory was 125.8 MB in the beginning and 272.6 MB in the end (delta: 146.8 MB). Free memory was 100.0 MB in the beginning and 199.4 MB in the end (delta: -99.4 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,430 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 125.8 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 14:56:27,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.59 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 99.4 MB in the beginning and 135.4 MB in the end (delta: -36.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.25 ms. Allocated memory is still 157.3 MB. Free memory was 135.4 MB in the beginning and 133.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,431 INFO L168 Benchmark]: Boogie Preprocessor took 30.41 ms. Allocated memory is still 157.3 MB. Free memory was 133.6 MB in the beginning and 132.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,432 INFO L168 Benchmark]: RCFGBuilder took 589.54 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 111.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,432 INFO L168 Benchmark]: TraceAbstraction took 232181.93 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 111.3 MB in the beginning and 199.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 28.7 MB. Max. memory is 8.0 GB. [2020-11-09 14:56:27,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 125.8 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 621.59 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 99.4 MB in the beginning and 135.4 MB in the end (delta: -36.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.25 ms. Allocated memory is still 157.3 MB. Free memory was 135.4 MB in the beginning and 133.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.41 ms. Allocated memory is still 157.3 MB. Free memory was 133.6 MB in the beginning and 132.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 589.54 ms. Allocated memory is still 157.3 MB. Free memory was 132.2 MB in the beginning and 111.7 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 232181.93 ms. Allocated memory was 157.3 MB in the beginning and 272.6 MB in the end (delta: 115.3 MB). Free memory was 111.3 MB in the beginning and 199.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 28.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.4s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 232.0s, OverallIterations: 101, TraceHistogramMax: 21, AutomataDifference: 149.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 1566 SDtfs, 9209 SDslu, 11989 SDs, 0 SdLazy, 13639 SolverSat, 10667 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9428 GetRequests, 3140 SyntacticMatches, 121 SemanticMatches, 6167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136002 ImplicationChecksByTransitivity, 165.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 101 MinimizatonAttempts, 4570 StatesRemovedByMinimization, 98 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 44.5s InterpolantComputationTime, 5854 NumberOfCodeBlocks, 5854 NumberOfCodeBlocksAsserted, 727 NumberOfCheckSat, 5656 ConstructedInterpolants, 0 QuantifiedInterpolants, 746246 SizeOfPredicates, 2071 NumberOfNonLiveVariables, 18236 ConjunctsInSsa, 2505 ConjunctsInUnsatCore, 198 InterpolantComputations, 6 PerfectInterpolantSequences, 1560/27440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...