/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:56:59,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:56:59,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:56:59,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:56:59,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:56:59,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:56:59,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:56:59,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:56:59,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:56:59,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:56:59,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:56:59,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:56:59,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:56:59,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:56:59,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:56:59,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:56:59,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:56:59,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:56:59,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:56:59,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:56:59,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:56:59,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:56:59,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:56:59,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:56:59,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 14:56:59,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:56:59,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:56:59,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:56:59,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:56:59,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:56:59,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:56:59,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:56:59,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:56:59,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:56:59,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:56:59,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:56:59,868 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 [2020-09-17 14:56:59,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:56:59,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:56:59,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:56:59,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:56:59,929 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:56:59,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:56:59,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:56:59,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:56:59,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:56:59,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:56:59,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:56:59,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:56:59,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:56:59,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:56:59,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:56:59,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:56:59,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:56:59,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:56:59,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:56:59,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:56:59,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:56:59,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:56:59,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:56:59,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:56:59,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:56:59,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:56:59,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:56:59,936 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-17 14:56:59,936 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:56:59,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:56:59,937 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-17 14:57:00,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:57:00,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:57:00,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:57:00,425 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:57:00,426 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:57:00,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-17 14:57:00,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d8a4255d/5ae2d05c7e084e6b98b869c8ff7691a5/FLAG95a5a3a10 [2020-09-17 14:57:01,196 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:57:01,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-17 14:57:01,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d8a4255d/5ae2d05c7e084e6b98b869c8ff7691a5/FLAG95a5a3a10 [2020-09-17 14:57:01,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d8a4255d/5ae2d05c7e084e6b98b869c8ff7691a5 [2020-09-17 14:57:01,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:57:01,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:57:01,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:57:01,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:57:01,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:57:01,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:57:01" (1/1) ... [2020-09-17 14:57:01,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af2166b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:01, skipping insertion in model container [2020-09-17 14:57:01,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:57:01" (1/1) ... [2020-09-17 14:57:01,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:57:01,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:57:02,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:57:02,077 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:57:02,146 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:57:02,226 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:57:02,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02 WrapperNode [2020-09-17 14:57:02,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:57:02,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:57:02,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:57:02,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:57:02,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:57:02,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:57:02,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:57:02,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:57:02,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (1/1) ... [2020-09-17 14:57:02,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:57:02,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:57:02,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:57:02,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:57:02,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (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 [2020-09-17 14:57:02,396 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 14:57:02,397 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 14:57:02,397 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 14:57:02,397 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 14:57:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:57:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 14:57:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:57:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 14:57:02,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:57:02,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:57:02,402 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 14:57:02,832 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:57:02,833 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 14:57:02,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:57:02 BoogieIcfgContainer [2020-09-17 14:57:02,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:57:02,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:57:02,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:57:02,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:57:02,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:57:01" (1/3) ... [2020-09-17 14:57:02,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5be745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:57:02, skipping insertion in model container [2020-09-17 14:57:02,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:57:02" (2/3) ... [2020-09-17 14:57:02,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5be745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:57:02, skipping insertion in model container [2020-09-17 14:57:02,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:57:02" (3/3) ... [2020-09-17 14:57:02,850 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-17 14:57:02,862 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:57:02,862 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:57:02,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:57:02,873 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:57:02,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,904 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,908 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,910 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,911 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,917 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,918 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,918 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,919 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,919 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,932 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,933 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,933 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,933 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,934 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:57:02,960 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 14:57:02,986 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:57:02,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:57:02,987 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:57:02,987 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-17 14:57:02,987 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:57:02,987 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:57:02,987 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:57:02,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:57:03,008 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:03,011 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:03,061 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:57:03,062 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:57:03,070 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:57:03,073 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:57:03,095 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:57:03,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:57:03,097 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:57:03,099 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 14:57:03,101 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:57:04,217 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 14:57:04,464 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 14:57:04,464 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 14:57:04,470 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 14:57:04,485 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 14:57:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 14:57:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 14:57:04,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:04,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 14:57:04,499 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 14:57:04,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:04,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587894856] [2020-09-17 14:57:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:04,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587894856] [2020-09-17 14:57:04,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:04,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 14:57:04,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803010883] [2020-09-17 14:57:04,833 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:04,838 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:04,858 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-17 14:57:04,858 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:04,861 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:57:04,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 14:57:04,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 14:57:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 14:57:04,898 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 14:57:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:05,013 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 14:57:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 14:57:05,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 14:57:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:05,034 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:05,034 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 14:57:05,036 INFO L675 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 [2020-09-17 14:57:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 14:57:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 14:57:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 14:57:05,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 14:57:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:05,100 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 14:57:05,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 14:57:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 14:57:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:57:05,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:05,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:05,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:57:05,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 14:57:05,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:05,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506388452] [2020-09-17 14:57:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:05,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506388452] [2020-09-17 14:57:05,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:05,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:57:05,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1491203046] [2020-09-17 14:57:05,311 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:05,312 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:05,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-17 14:57:05,316 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:05,347 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:57:05,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 14:57:05,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:05,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 14:57:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:57:05,350 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 14:57:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:05,390 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 14:57:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 14:57:05,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 14:57:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:05,392 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:57:05,392 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:57:05,393 INFO L675 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 [2020-09-17 14:57:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:57:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:57:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 14:57:05,402 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 14:57:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:05,404 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 14:57:05,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 14:57:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 14:57:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 14:57:05,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:05,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:05,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 14:57:05,407 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 14:57:05,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:05,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382115165] [2020-09-17 14:57:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:05,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382115165] [2020-09-17 14:57:05,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:57:05,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 14:57:05,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471292085] [2020-09-17 14:57:05,511 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:05,513 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:05,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-17 14:57:05,516 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:05,526 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:05,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:05,581 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:05,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 14:57:05,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 14:57:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-17 14:57:05,583 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-17 14:57:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:05,752 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-17 14:57:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:57:05,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-17 14:57:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:05,754 INFO L225 Difference]: With dead ends: 62 [2020-09-17 14:57:05,754 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 14:57:05,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 14:57:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-17 14:57:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 14:57:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 14:57:05,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-17 14:57:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:05,762 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 14:57:05,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 14:57:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 14:57:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:57:05,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:05,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:05,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 14:57:05,764 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-17 14:57:05,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:05,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540150665] [2020-09-17 14:57:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540150665] [2020-09-17 14:57:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883487042] [2020-09-17 14:57:05,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:05,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:05,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:57:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:06,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:06,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:57:06,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827558601] [2020-09-17 14:57:06,006 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:06,007 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:06,010 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-17 14:57:06,010 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:06,013 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,013 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,049 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,050 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,092 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,092 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,104 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,115 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,115 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,139 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,139 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,167 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:06,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:57:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:57:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:57:06,168 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-17 14:57:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:06,357 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-17 14:57:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:57:06,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:57:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:06,359 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:57:06,359 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:57:06,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:57:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:57:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-17 14:57:06,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-17 14:57:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:06,370 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-17 14:57:06,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:57:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-17 14:57:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:57:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:06,371 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:06,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:06,573 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:06,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-17 14:57:06,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:06,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321035126] [2020-09-17 14:57:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:06,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321035126] [2020-09-17 14:57:06,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043009793] [2020-09-17 14:57:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:06,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 14:57:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:06,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:57:06,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:06,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:06,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:57:06,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1258416343] [2020-09-17 14:57:06,780 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:06,782 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:06,784 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-17 14:57:06,784 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:06,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,786 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,837 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:06,838 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:06,864 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:06,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:57:06,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:57:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:57:06,865 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-17 14:57:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:07,140 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-17 14:57:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:57:07,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:57:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:07,142 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:57:07,142 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:57:07,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:57:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-17 14:57:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:57:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-17 14:57:07,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-17 14:57:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:07,150 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-17 14:57:07,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:57:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-17 14:57:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:57:07,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:07,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:07,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:07,353 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-17 14:57:07,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:07,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546465512] [2020-09-17 14:57:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:07,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546465512] [2020-09-17 14:57:07,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057600287] [2020-09-17 14:57:07,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:07,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:57:07,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:07,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:07,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:57:07,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2099484197] [2020-09-17 14:57:07,599 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:07,600 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:07,604 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-17 14:57:07,604 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:07,609 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:07,609 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:07,662 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:07,663 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:07,685 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:07,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:57:07,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:57:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:57:07,687 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-17 14:57:07,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:07,894 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-17 14:57:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:57:07,895 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:57:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:07,897 INFO L225 Difference]: With dead ends: 64 [2020-09-17 14:57:07,897 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 14:57:07,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 14:57:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 14:57:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 14:57:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-17 14:57:07,904 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-17 14:57:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:07,904 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-17 14:57:07,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:57:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-17 14:57:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:57:07,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:07,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:08,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:08,112 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-17 14:57:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:08,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898222614] [2020-09-17 14:57:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:08,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898222614] [2020-09-17 14:57:08,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977416248] [2020-09-17 14:57:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:08,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:57:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:08,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:08,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:57:08,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [714138321] [2020-09-17 14:57:08,335 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:08,336 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:08,340 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-17 14:57:08,340 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:08,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:08,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:08,412 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:08,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:08,440 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:08,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:57:08,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:57:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:57:08,441 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-17 14:57:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:08,682 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-17 14:57:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:57:08,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:57:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:08,684 INFO L225 Difference]: With dead ends: 63 [2020-09-17 14:57:08,684 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 14:57:08,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 14:57:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-17 14:57:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:57:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 14:57:08,692 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-17 14:57:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:08,692 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 14:57:08,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:57:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 14:57:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:08,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:08,693 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:08,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:08,897 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:08,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-17 14:57:08,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:08,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175559762] [2020-09-17 14:57:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:09,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175559762] [2020-09-17 14:57:09,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964930328] [2020-09-17 14:57:09,013 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 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 [2020-09-17 14:57:09,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 14:57:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:09,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:09,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:09,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342745575] [2020-09-17 14:57:09,089 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:09,090 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:09,094 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-17 14:57:09,094 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:09,096 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,096 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,121 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,121 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,146 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,147 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,160 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,160 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,173 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,182 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,182 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,201 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,209 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,209 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,219 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:09,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:09,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:09,220 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-17 14:57:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:09,406 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-17 14:57:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:57:09,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:09,408 INFO L225 Difference]: With dead ends: 60 [2020-09-17 14:57:09,408 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:57:09,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:57:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 14:57:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:57:09,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-17 14:57:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:09,416 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:57:09,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:57:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:09,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:09,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:09,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:09,619 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-17 14:57:09,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:09,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081667902] [2020-09-17 14:57:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:09,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081667902] [2020-09-17 14:57:09,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119028027] [2020-09-17 14:57:09,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:09,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:09,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:09,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1710686507] [2020-09-17 14:57:09,860 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:09,861 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:09,865 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:57:09,865 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:09,869 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,870 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,916 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:09,916 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:09,929 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:09,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:09,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:09,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:09,932 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-17 14:57:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:10,247 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 14:57:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:10,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:10,249 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:57:10,250 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 14:57:10,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:57:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 14:57:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 14:57:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 14:57:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-17 14:57:10,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-17 14:57:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:10,257 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-17 14:57:10,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-17 14:57:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:57:10,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:10,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:10,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:10,475 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-17 14:57:10,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:10,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530561309] [2020-09-17 14:57:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:10,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530561309] [2020-09-17 14:57:10,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132126976] [2020-09-17 14:57:10,586 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 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 [2020-09-17 14:57:10,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:10,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:57:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:57:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230654425] [2020-09-17 14:57:10,677 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:10,678 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:10,682 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:57:10,682 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:10,686 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:10,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:10,721 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:10,722 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:10,734 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:10,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:57:10,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:10,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:57:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:57:10,736 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-17 14:57:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:11,110 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-17 14:57:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:57:11,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:57:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:11,112 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:57:11,112 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 14:57:11,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:57:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 14:57:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-17 14:57:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 14:57:11,118 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-17 14:57:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:11,118 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 14:57:11,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:57:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 14:57:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:11,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:11,119 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:11,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 14:57:11,333 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-17 14:57:11,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:11,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20774925] [2020-09-17 14:57:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:11,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20774925] [2020-09-17 14:57:11,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057278693] [2020-09-17 14:57:11,499 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 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 [2020-09-17 14:57:11,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:57:11,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:11,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:11,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:11,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:11,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2089102449] [2020-09-17 14:57:11,617 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:11,619 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:11,624 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-17 14:57:11,624 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:11,634 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:11,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:11,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:11,739 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:11,756 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:11,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:11,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:11,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:11,759 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-17 14:57:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:12,016 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-17 14:57:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:57:12,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:12,018 INFO L225 Difference]: With dead ends: 70 [2020-09-17 14:57:12,018 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 14:57:12,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:57:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 14:57:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-17 14:57:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 14:57:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-17 14:57:12,033 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-17 14:57:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:12,034 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-17 14:57:12,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-17 14:57:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:12,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:12,035 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:12,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 14:57:12,253 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-17 14:57:12,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:12,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581122059] [2020-09-17 14:57:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581122059] [2020-09-17 14:57:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228638957] [2020-09-17 14:57:12,367 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 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 [2020-09-17 14:57:12,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:12,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:12,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:12,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:12,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1708838986] [2020-09-17 14:57:12,451 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:12,452 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:12,455 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:57:12,455 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:12,459 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:12,460 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:12,509 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:12,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:12,524 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:12,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:12,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:12,525 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-17 14:57:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:12,863 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 14:57:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:12,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:12,866 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:57:12,866 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:57:12,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:57:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:57:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-17 14:57:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 14:57:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-17 14:57:12,872 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-17 14:57:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:12,872 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-17 14:57:12,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-17 14:57:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:57:12,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:12,874 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:13,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:13,088 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-17 14:57:13,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:13,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051461920] [2020-09-17 14:57:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:13,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051461920] [2020-09-17 14:57:13,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671278593] [2020-09-17 14:57:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:13,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 14:57:13,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:57:13,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:13,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:13,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:57:13,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1272894092] [2020-09-17 14:57:13,310 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:13,312 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:13,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:57:13,315 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:13,319 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:13,319 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:13,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:13,353 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:13,365 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:13,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:57:13,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:57:13,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:57:13,367 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-17 14:57:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:13,771 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-17 14:57:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:57:13,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:57:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:13,773 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:57:13,773 INFO L226 Difference]: Without dead ends: 57 [2020-09-17 14:57:13,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:57:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-17 14:57:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-17 14:57:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:57:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 14:57:13,777 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-17 14:57:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:13,778 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 14:57:13,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:57:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 14:57:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:13,779 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:13,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:13,990 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-17 14:57:13,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:13,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716214639] [2020-09-17 14:57:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:14,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716214639] [2020-09-17 14:57:14,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656731157] [2020-09-17 14:57:14,110 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 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 [2020-09-17 14:57:14,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:57:14,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:14,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:14,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:14,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [309248408] [2020-09-17 14:57:14,180 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:14,181 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:14,185 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-17 14:57:14,185 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:14,186 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,187 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,220 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,239 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,250 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,250 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,258 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,259 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,274 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,275 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,296 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,296 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,302 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:14,303 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:14,312 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:14,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:14,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:14,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:14,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:14,314 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-17 14:57:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:14,578 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-17 14:57:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:14,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:14,579 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:57:14,580 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 14:57:14,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:57:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 14:57:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 14:57:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:57:14,586 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-17 14:57:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:14,586 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:57:14,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:57:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:14,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:14,588 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:14,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:57:14,792 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-17 14:57:14,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:14,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016648822] [2020-09-17 14:57:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:14,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016648822] [2020-09-17 14:57:14,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919503789] [2020-09-17 14:57:14,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:14,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:15,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:15,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [879422996] [2020-09-17 14:57:15,012 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:15,013 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:15,017 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:15,017 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:15,022 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,023 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,056 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,070 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:15,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:15,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:15,072 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-17 14:57:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:15,417 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-17 14:57:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:15,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:15,419 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:57:15,419 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 14:57:15,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:57:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 14:57:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 14:57:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 14:57:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-17 14:57:15,424 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-17 14:57:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:15,424 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-17 14:57:15,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-17 14:57:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:15,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:15,445 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:15,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 14:57:15,653 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-17 14:57:15,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:15,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505359384] [2020-09-17 14:57:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505359384] [2020-09-17 14:57:15,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155219797] [2020-09-17 14:57:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:15,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:15,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:15,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:15,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [217851941] [2020-09-17 14:57:15,849 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:15,850 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:15,853 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:15,853 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:15,855 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,890 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:15,890 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:15,901 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:15,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:15,903 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-17 14:57:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:16,300 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 14:57:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:16,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:16,302 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:16,302 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:16,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 14:57:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:57:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-17 14:57:16,307 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-17 14:57:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:16,307 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-17 14:57:16,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-17 14:57:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:57:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:16,308 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:16,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:57:16,520 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-17 14:57:16,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:16,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625944861] [2020-09-17 14:57:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:16,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625944861] [2020-09-17 14:57:16,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502575021] [2020-09-17 14:57:16,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:16,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 14:57:16,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:57:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:16,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:16,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:57:16,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [772660603] [2020-09-17 14:57:16,717 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:16,718 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:16,721 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:57:16,721 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:16,725 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:16,725 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:16,756 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:16,757 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:16,768 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:16,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:57:16,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:57:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:57:16,769 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-17 14:57:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:17,226 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-17 14:57:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:57:17,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:57:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:17,228 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:57:17,228 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 14:57:17,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 14:57:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-17 14:57:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 14:57:17,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-17 14:57:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:17,233 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 14:57:17,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:57:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 14:57:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:17,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:17,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:17,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:17,435 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-17 14:57:17,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:17,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6999630] [2020-09-17 14:57:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6999630] [2020-09-17 14:57:17,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823493137] [2020-09-17 14:57:17,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:17,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:17,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:17,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:17,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:17,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [675674780] [2020-09-17 14:57:17,693 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:17,694 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:17,697 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-17 14:57:17,698 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:17,699 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,699 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,733 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:17,734 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:17,757 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:17,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:17,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:17,759 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-17 14:57:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:18,034 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 14:57:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:57:18,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:18,036 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:57:18,036 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:57:18,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:57:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:57:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-17 14:57:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 14:57:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-17 14:57:18,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-17 14:57:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:18,044 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-17 14:57:18,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-17 14:57:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:18,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:18,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:18,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:57:18,254 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:18,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-17 14:57:18,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:18,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766163428] [2020-09-17 14:57:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:18,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766163428] [2020-09-17 14:57:18,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120829861] [2020-09-17 14:57:18,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:18,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 14:57:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:18,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:18,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [826119472] [2020-09-17 14:57:18,490 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:18,491 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:18,495 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:18,495 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:18,498 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,499 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,533 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:18,534 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:18,547 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:18,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:18,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:18,548 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-17 14:57:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:18,930 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-17 14:57:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:18,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:18,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:18,933 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:18,933 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:18,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:57:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 14:57:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 14:57:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 14:57:18,937 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-17 14:57:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:18,938 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 14:57:18,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 14:57:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:18,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:18,939 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:19,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:19,148 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-17 14:57:19,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:19,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704646242] [2020-09-17 14:57:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:19,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704646242] [2020-09-17 14:57:19,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244285637] [2020-09-17 14:57:19,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:19,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:57:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:19,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:19,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:19,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101171776] [2020-09-17 14:57:19,343 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:19,344 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:19,347 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:19,347 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:19,350 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:19,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:19,383 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:19,384 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:19,399 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:19,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:19,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:19,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:19,401 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-17 14:57:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:19,842 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-17 14:57:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:19,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:19,844 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:19,844 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:19,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:57:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-17 14:57:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:57:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-17 14:57:19,848 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-17 14:57:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:19,848 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-17 14:57:19,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-17 14:57:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:57:19,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:19,850 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:20,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:20,051 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-17 14:57:20,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:20,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427041805] [2020-09-17 14:57:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:20,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427041805] [2020-09-17 14:57:20,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853858007] [2020-09-17 14:57:20,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:57:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:20,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:20,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:57:20,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [256107631] [2020-09-17 14:57:20,241 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:20,243 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:20,245 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:57:20,246 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:20,247 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,247 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,280 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:20,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:20,294 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:20,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:57:20,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:20,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:57:20,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:57:20,296 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-17 14:57:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:20,729 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-17 14:57:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:57:20,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:57:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:20,730 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:57:20,731 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:57:20,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:57:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:57:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 14:57:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:57:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:57:20,735 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-17 14:57:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:20,735 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:57:20,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:57:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:57:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:20,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:20,737 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:20,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:57:20,947 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:20,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-17 14:57:20,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:20,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636410388] [2020-09-17 14:57:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:21,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636410388] [2020-09-17 14:57:21,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426020212] [2020-09-17 14:57:21,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:21,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:21,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:21,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:21,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [181185944] [2020-09-17 14:57:21,195 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:21,197 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:21,201 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-17 14:57:21,202 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:21,203 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,203 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,233 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,233 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,253 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,253 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,261 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,261 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,274 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,286 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,286 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,312 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,312 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,322 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:21,322 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:21,330 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:21,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:21,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:21,331 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-17 14:57:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:21,722 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-17 14:57:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:21,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:21,723 INFO L225 Difference]: With dead ends: 72 [2020-09-17 14:57:21,724 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 14:57:21,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:57:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 14:57:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 14:57:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:57:21,728 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-17 14:57:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:21,728 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:57:21,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:57:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:21,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:21,729 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:21,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:21,930 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-17 14:57:21,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:21,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424786323] [2020-09-17 14:57:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:22,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424786323] [2020-09-17 14:57:22,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49263029] [2020-09-17 14:57:22,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:22,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:57:22,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:22,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:22,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:22,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745273439] [2020-09-17 14:57:22,169 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:22,171 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:22,174 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:22,175 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:22,178 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:22,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:22,227 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:22,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:22,241 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:22,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:22,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:22,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:22,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:22,243 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-17 14:57:22,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:22,678 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-17 14:57:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:22,679 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:22,680 INFO L225 Difference]: With dead ends: 92 [2020-09-17 14:57:22,680 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:57:22,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:57:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-17 14:57:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 14:57:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-17 14:57:22,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-17 14:57:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:22,685 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-17 14:57:22,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-17 14:57:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:22,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:22,686 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:22,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 14:57:22,887 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-17 14:57:22,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:22,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635377127] [2020-09-17 14:57:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635377127] [2020-09-17 14:57:23,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694245171] [2020-09-17 14:57:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:23,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:23,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:23,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:23,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:23,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:23,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:23,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [669545467] [2020-09-17 14:57:23,120 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:23,121 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:23,125 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:23,125 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:23,128 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,128 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:23,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:23,183 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:23,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:23,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:23,184 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-17 14:57:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:23,678 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-17 14:57:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:23,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:23,679 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:23,680 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:23,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 14:57:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-17 14:57:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:57:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-17 14:57:23,684 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-17 14:57:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:23,685 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-17 14:57:23,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-17 14:57:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:23,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:23,686 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:23,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 14:57:23,898 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-17 14:57:23,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:23,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316671860] [2020-09-17 14:57:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316671860] [2020-09-17 14:57:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235307735] [2020-09-17 14:57:24,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:24,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:57:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:24,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:24,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:24,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:24,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:24,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2089118744] [2020-09-17 14:57:24,124 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:24,126 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:24,129 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:24,130 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:24,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:24,131 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:24,176 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:24,177 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:24,190 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:24,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:24,191 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-17 14:57:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:24,760 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-17 14:57:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:24,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:24,762 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:24,762 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 14:57:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:57:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-17 14:57:24,766 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-17 14:57:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:24,766 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-17 14:57:24,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-17 14:57:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:57:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:24,767 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:24,976 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-17 14:57:24,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072866751] [2020-09-17 14:57:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:25,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072866751] [2020-09-17 14:57:25,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877092958] [2020-09-17 14:57:25,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:25,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 14:57:25,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:25,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:57:25,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:25,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:25,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:57:25,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243228598] [2020-09-17 14:57:25,200 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:25,202 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:25,205 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:57:25,205 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:25,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:25,207 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:25,249 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:25,249 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:25,267 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:25,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:57:25,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:57:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:57:25,268 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-17 14:57:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:25,900 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-17 14:57:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:57:25,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:57:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:25,901 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:57:25,902 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:57:25,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:57:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:57:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-17 14:57:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 14:57:25,905 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-17 14:57:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:25,905 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 14:57:25,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:57:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 14:57:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:25,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:25,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:26,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 14:57:26,114 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-17 14:57:26,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:26,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083530074] [2020-09-17 14:57:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:26,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083530074] [2020-09-17 14:57:26,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756551506] [2020-09-17 14:57:26,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:26,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:26,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:26,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [709686788] [2020-09-17 14:57:26,392 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:26,394 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:26,399 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-17 14:57:26,399 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:26,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:26,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:26,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:26,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:26,498 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:26,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:26,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:26,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:26,501 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-17 14:57:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:26,859 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-17 14:57:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:57:26,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:26,861 INFO L225 Difference]: With dead ends: 86 [2020-09-17 14:57:26,861 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 14:57:26,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:57:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 14:57:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 14:57:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:57:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-17 14:57:26,863 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-17 14:57:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:26,864 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-17 14:57:26,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-17 14:57:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:26,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:26,865 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:27,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:27,066 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-17 14:57:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:27,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501323001] [2020-09-17 14:57:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:27,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501323001] [2020-09-17 14:57:27,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008025579] [2020-09-17 14:57:27,237 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 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 [2020-09-17 14:57:27,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:27,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:27,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:27,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403807351] [2020-09-17 14:57:27,310 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:27,311 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:27,315 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:27,315 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:27,318 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:27,318 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:27,355 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:27,355 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:27,370 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:27,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:27,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:27,371 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-17 14:57:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:27,833 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-17 14:57:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:27,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:27,834 INFO L225 Difference]: With dead ends: 83 [2020-09-17 14:57:27,835 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 14:57:27,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:57:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 14:57:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-17 14:57:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 14:57:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-17 14:57:27,839 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-17 14:57:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:27,840 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-17 14:57:27,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-17 14:57:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:27,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:27,840 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:28,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 14:57:28,051 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-17 14:57:28,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:28,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481415483] [2020-09-17 14:57:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:28,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481415483] [2020-09-17 14:57:28,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409223073] [2020-09-17 14:57:28,194 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 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 [2020-09-17 14:57:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:57:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:28,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:28,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:28,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234850544] [2020-09-17 14:57:28,282 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:28,284 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:28,287 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:28,288 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:28,288 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:28,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:28,320 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:28,320 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:28,338 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:28,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:28,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:28,339 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-17 14:57:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:28,863 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-17 14:57:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:28,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:28,864 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:28,865 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:28,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:57:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-17 14:57:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 14:57:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-17 14:57:28,869 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-17 14:57:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:28,869 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-17 14:57:28,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-17 14:57:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:28,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:28,870 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:29,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 14:57:29,079 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-17 14:57:29,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:29,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329038978] [2020-09-17 14:57:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:29,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329038978] [2020-09-17 14:57:29,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086503022] [2020-09-17 14:57:29,256 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 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 [2020-09-17 14:57:29,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:29,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:29,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:29,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:29,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2057102965] [2020-09-17 14:57:29,340 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:29,342 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:29,344 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:29,344 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:29,345 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:29,345 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:29,389 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:29,390 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:29,411 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:29,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:29,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:29,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:29,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:29,413 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-17 14:57:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:30,008 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-17 14:57:30,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:30,009 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:30,010 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:30,011 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:30,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:57:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-17 14:57:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 14:57:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-17 14:57:30,015 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-17 14:57:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:30,016 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-17 14:57:30,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-17 14:57:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:57:30,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:30,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:30,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:30,229 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-17 14:57:30,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:30,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677022843] [2020-09-17 14:57:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:30,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677022843] [2020-09-17 14:57:30,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226226823] [2020-09-17 14:57:30,387 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 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 [2020-09-17 14:57:30,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:57:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:57:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:30,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:30,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 14:57:30,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [649525033] [2020-09-17 14:57:30,469 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:30,471 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:30,475 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-17 14:57:30,475 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:30,476 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,476 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,506 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:30,506 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:30,516 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:57:30,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:57:30,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:57:30,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:57:30,518 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-17 14:57:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:31,171 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-09-17 14:57:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:57:31,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 14:57:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:31,178 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:57:31,178 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:57:31,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:57:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:57:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-09-17 14:57:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:57:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:57:31,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-09-17 14:57:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:31,182 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:57:31,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:57:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:57:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:31,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:31,183 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:31,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:31,393 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:31,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-09-17 14:57:31,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:31,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328080619] [2020-09-17 14:57:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:31,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328080619] [2020-09-17 14:57:31,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060835464] [2020-09-17 14:57:31,619 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 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 [2020-09-17 14:57:31,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 14:57:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:31,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:31,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:31,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [993949560] [2020-09-17 14:57:31,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:31,744 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:31,749 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-17 14:57:31,750 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:31,751 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,751 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,777 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,793 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,804 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,804 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,812 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,813 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,819 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,820 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,847 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,848 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,860 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:31,860 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:31,868 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:31,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:31,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:31,869 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-09-17 14:57:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:32,271 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-09-17 14:57:32,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:32,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:32,272 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:57:32,272 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:57:32,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:57:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:57:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 14:57:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:57:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 14:57:32,276 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-09-17 14:57:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:32,277 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 14:57:32,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 14:57:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:32,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:32,278 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:32,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 14:57:32,486 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-09-17 14:57:32,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:32,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371721839] [2020-09-17 14:57:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:32,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371721839] [2020-09-17 14:57:32,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395746268] [2020-09-17 14:57:32,661 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 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 [2020-09-17 14:57:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:32,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:32,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:32,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1985450254] [2020-09-17 14:57:32,742 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:32,744 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:32,748 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:32,748 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:32,749 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:32,749 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:32,785 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:32,785 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:32,794 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:32,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:32,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:32,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:32,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:32,796 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-09-17 14:57:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:33,305 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-09-17 14:57:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:33,309 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:33,310 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:57:33,310 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:57:33,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:57:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-09-17 14:57:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:57:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-09-17 14:57:33,315 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-09-17 14:57:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:33,315 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-09-17 14:57:33,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-09-17 14:57:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:33,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:33,316 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:33,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:33,520 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-09-17 14:57:33,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:33,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000322840] [2020-09-17 14:57:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:33,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000322840] [2020-09-17 14:57:33,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660924140] [2020-09-17 14:57:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:33,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:33,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:33,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:33,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:33,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1632493553] [2020-09-17 14:57:33,800 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:33,802 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:33,805 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:33,806 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:33,806 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:33,807 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:33,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:33,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:33,865 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:33,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:33,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:33,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:33,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:33,867 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-09-17 14:57:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:34,479 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-09-17 14:57:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:34,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:34,480 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:57:34,480 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:57:34,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:57:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:57:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-09-17 14:57:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:57:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-09-17 14:57:34,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-09-17 14:57:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:34,485 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-09-17 14:57:34,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-09-17 14:57:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:34,485 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:34,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 14:57:34,689 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:34,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-09-17 14:57:34,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:34,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662888816] [2020-09-17 14:57:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:34,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662888816] [2020-09-17 14:57:34,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272715899] [2020-09-17 14:57:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:34,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 14:57:34,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:34,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:34,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:34,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:34,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1614864107] [2020-09-17 14:57:34,954 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:34,956 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:34,960 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:34,961 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:34,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:34,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:35,012 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:35,013 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:35,023 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:35,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:35,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:35,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:35,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:35,025 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-09-17 14:57:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:35,702 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-09-17 14:57:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:35,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:35,704 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:57:35,704 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:57:35,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:57:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:57:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-09-17 14:57:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 14:57:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-09-17 14:57:35,708 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-09-17 14:57:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:35,708 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-09-17 14:57:35,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-09-17 14:57:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:35,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:35,709 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:35,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-17 14:57:35,922 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-09-17 14:57:35,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:35,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921043149] [2020-09-17 14:57:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:36,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921043149] [2020-09-17 14:57:36,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643109457] [2020-09-17 14:57:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:36,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:36,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:36,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:36,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1478360540] [2020-09-17 14:57:36,151 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:36,153 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:36,158 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:36,158 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:36,162 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:36,162 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:36,207 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:36,207 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:36,224 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:36,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:36,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:36,225 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-09-17 14:57:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:36,959 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 14:57:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:36,959 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:36,960 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:57:36,961 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:57:36,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1039, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 14:57:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:57:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 14:57:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:57:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-09-17 14:57:36,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-09-17 14:57:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:36,966 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-09-17 14:57:36,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-09-17 14:57:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:57:36,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:36,967 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:37,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 14:57:37,168 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-09-17 14:57:37,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:37,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428874214] [2020-09-17 14:57:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:37,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428874214] [2020-09-17 14:57:37,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910283875] [2020-09-17 14:57:37,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:57:37,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 14:57:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:57:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:37,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:37,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 14:57:37,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [979356264] [2020-09-17 14:57:37,473 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:37,476 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:37,481 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-17 14:57:37,482 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:37,483 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:37,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:37,519 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:37,519 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:37,534 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:37,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 14:57:37,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:37,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 14:57:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:57:37,535 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-09-17 14:57:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:38,306 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 14:57:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 14:57:38,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 14:57:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:38,307 INFO L225 Difference]: With dead ends: 98 [2020-09-17 14:57:38,307 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:57:38,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=526, Invalid=1114, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:57:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:57:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-09-17 14:57:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 14:57:38,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-09-17 14:57:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:38,311 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 14:57:38,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 14:57:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 14:57:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:38,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:38,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:38,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 14:57:38,521 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:38,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:38,522 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-09-17 14:57:38,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:38,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103072126] [2020-09-17 14:57:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:38,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103072126] [2020-09-17 14:57:38,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548990101] [2020-09-17 14:57:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:38,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 14:57:38,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:38,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:38,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:38,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1493777955] [2020-09-17 14:57:38,823 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:38,825 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:38,828 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-09-17 14:57:38,828 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:38,830 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:38,830 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:38,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:38,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:38,893 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:38,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:38,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:38,894 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-09-17 14:57:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:39,336 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-09-17 14:57:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:57:39,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:39,338 INFO L225 Difference]: With dead ends: 94 [2020-09-17 14:57:39,338 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 14:57:39,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:57:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 14:57:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-09-17 14:57:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 14:57:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-09-17 14:57:39,342 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-09-17 14:57:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:39,343 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-09-17 14:57:39,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-09-17 14:57:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:39,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:39,344 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:39,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 14:57:39,554 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-09-17 14:57:39,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:39,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888891443] [2020-09-17 14:57:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:39,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888891443] [2020-09-17 14:57:39,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663200369] [2020-09-17 14:57:39,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:39,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:39,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:39,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1318774594] [2020-09-17 14:57:39,854 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:39,856 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:39,859 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:39,859 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:39,862 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:39,862 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:39,904 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:39,905 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:39,920 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:39,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:39,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:39,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:39,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:39,921 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-09-17 14:57:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:40,445 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-09-17 14:57:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:40,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:40,447 INFO L225 Difference]: With dead ends: 91 [2020-09-17 14:57:40,447 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 14:57:40,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:57:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 14:57:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-09-17 14:57:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 14:57:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-09-17 14:57:40,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-09-17 14:57:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:40,451 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-09-17 14:57:40,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-09-17 14:57:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:40,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:40,452 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:40,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 14:57:40,660 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-09-17 14:57:40,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:40,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136064173] [2020-09-17 14:57:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:40,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136064173] [2020-09-17 14:57:40,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278240034] [2020-09-17 14:57:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:40,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:40,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:40,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:40,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:40,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528261239] [2020-09-17 14:57:40,933 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:40,936 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:40,940 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:40,941 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:40,946 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,981 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:40,981 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:40,995 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:40,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:40,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:40,996 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-09-17 14:57:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:41,589 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-09-17 14:57:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:41,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:41,590 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:57:41,590 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:57:41,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:57:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:57:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-09-17 14:57:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 14:57:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-09-17 14:57:41,594 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-09-17 14:57:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:41,594 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-09-17 14:57:41,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-09-17 14:57:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:41,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:41,595 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 14:57:41,803 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-09-17 14:57:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:41,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724199795] [2020-09-17 14:57:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:42,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724199795] [2020-09-17 14:57:42,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757580529] [2020-09-17 14:57:42,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 14:57:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:42,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:42,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:42,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:42,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1207413727] [2020-09-17 14:57:42,109 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:42,111 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:42,115 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:42,115 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:42,117 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:42,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:42,159 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:42,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:42,172 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:42,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:42,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:42,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:42,173 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-09-17 14:57:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:42,874 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-09-17 14:57:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:42,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:42,876 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:42,876 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:57:42,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 14:57:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:57:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-09-17 14:57:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 14:57:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-09-17 14:57:42,880 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-09-17 14:57:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:42,880 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-09-17 14:57:42,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-09-17 14:57:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:42,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:42,881 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:43,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:43,092 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-09-17 14:57:43,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:43,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206073642] [2020-09-17 14:57:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:43,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206073642] [2020-09-17 14:57:43,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429739722] [2020-09-17 14:57:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:43,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:43,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:43,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:43,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:43,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1119971312] [2020-09-17 14:57:43,390 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:43,392 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:43,397 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:43,398 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:43,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:43,406 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:43,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:43,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:43,463 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:57:43,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:43,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:43,464 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-09-17 14:57:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:44,314 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-09-17 14:57:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:44,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:44,316 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:44,316 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:57:44,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:57:44,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:57:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-17 14:57:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:57:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-09-17 14:57:44,319 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-09-17 14:57:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:44,320 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-09-17 14:57:44,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-09-17 14:57:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 14:57:44,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:44,320 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:44,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:44,529 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-09-17 14:57:44,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:44,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610183523] [2020-09-17 14:57:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:44,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610183523] [2020-09-17 14:57:44,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916409594] [2020-09-17 14:57:44,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:44,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 14:57:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:57:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:44,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:44,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 14:57:44,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341743991] [2020-09-17 14:57:44,780 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:44,782 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:44,787 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-17 14:57:44,787 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:44,792 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:44,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:44,831 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:44,831 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:44,844 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:57:44,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:57:44,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:44,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:57:44,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:57:44,846 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-09-17 14:57:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:45,683 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-09-17 14:57:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 14:57:45,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 14:57:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:45,685 INFO L225 Difference]: With dead ends: 87 [2020-09-17 14:57:45,685 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:57:45,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:57:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:57:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:57:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:57:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:57:45,689 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-09-17 14:57:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:45,689 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:57:45,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:57:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:57:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:45,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:45,690 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:45,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:45,893 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-09-17 14:57:45,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:45,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15767057] [2020-09-17 14:57:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:46,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15767057] [2020-09-17 14:57:46,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955534839] [2020-09-17 14:57:46,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:46,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:57:46,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:46,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:46,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:46,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704818396] [2020-09-17 14:57:46,244 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:46,248 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:46,254 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-09-17 14:57:46,255 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:46,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,320 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,321 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,334 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,335 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,345 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,353 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,379 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,380 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,394 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:46,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:46,406 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:57:46,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:46,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:46,407 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-09-17 14:57:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:46,848 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-09-17 14:57:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:46,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:46,850 INFO L225 Difference]: With dead ends: 84 [2020-09-17 14:57:46,850 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:57:46,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=752, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 14:57:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:57:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 14:57:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:57:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 14:57:46,854 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-09-17 14:57:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:46,855 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 14:57:46,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 14:57:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:46,856 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:47,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 14:57:47,067 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-09-17 14:57:47,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:47,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341766703] [2020-09-17 14:57:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:47,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341766703] [2020-09-17 14:57:47,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96101315] [2020-09-17 14:57:47,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:47,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:47,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:47,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1580095301] [2020-09-17 14:57:47,392 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:47,394 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:47,399 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:47,399 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:47,402 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:47,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:47,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:47,437 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:47,454 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:57:47,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:47,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:47,455 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-09-17 14:57:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:48,083 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-09-17 14:57:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:48,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:48,085 INFO L225 Difference]: With dead ends: 112 [2020-09-17 14:57:48,085 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 14:57:48,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:57:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 14:57:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-09-17 14:57:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 14:57:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-09-17 14:57:48,093 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-09-17 14:57:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:48,093 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-09-17 14:57:48,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-09-17 14:57:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:48,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:48,094 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:48,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:48,305 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-09-17 14:57:48,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:48,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700136716] [2020-09-17 14:57:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:48,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700136716] [2020-09-17 14:57:48,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599119387] [2020-09-17 14:57:48,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:48,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:48,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:48,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:48,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:48,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803429156] [2020-09-17 14:57:48,602 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:48,605 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:48,608 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:48,608 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:48,611 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:48,612 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:48,656 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:48,656 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:48,671 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:48,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:48,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:48,673 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-09-17 14:57:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:49,384 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-09-17 14:57:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:49,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:49,386 INFO L225 Difference]: With dead ends: 109 [2020-09-17 14:57:49,386 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 14:57:49,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 14:57:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 14:57:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-09-17 14:57:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:57:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-09-17 14:57:49,391 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-09-17 14:57:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:49,391 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-09-17 14:57:49,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-09-17 14:57:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:49,392 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:49,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:49,601 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-09-17 14:57:49,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:49,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803818830] [2020-09-17 14:57:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:49,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803818830] [2020-09-17 14:57:49,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228198974] [2020-09-17 14:57:49,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:49,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:57:49,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:49,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:49,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:49,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064737231] [2020-09-17 14:57:49,924 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:49,928 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:49,935 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:49,935 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:49,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:49,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:49,984 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:49,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:49,996 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:49,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:49,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:49,998 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-09-17 14:57:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:50,708 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-17 14:57:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:57:50,709 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:50,710 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:57:50,710 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:57:50,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:57:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:57:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-09-17 14:57:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 14:57:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-09-17 14:57:50,714 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-09-17 14:57:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:50,714 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-09-17 14:57:50,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-09-17 14:57:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:50,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:50,715 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:50,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-17 14:57:50,916 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:50,916 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-09-17 14:57:50,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:50,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563878328] [2020-09-17 14:57:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:51,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563878328] [2020-09-17 14:57:51,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210652914] [2020-09-17 14:57:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:51,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:51,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:51,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:51,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:51,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [183831363] [2020-09-17 14:57:51,197 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:51,199 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:51,202 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:51,203 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:51,210 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:51,210 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:51,251 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:51,251 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:51,262 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:51,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:51,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:51,263 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-09-17 14:57:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:52,122 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 14:57:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:57:52,123 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:52,124 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:57:52,124 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:57:52,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=510, Invalid=1296, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 14:57:52,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:57:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-17 14:57:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:57:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-09-17 14:57:52,128 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-09-17 14:57:52,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:52,128 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-09-17 14:57:52,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-09-17 14:57:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:52,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:52,129 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:52,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 14:57:52,339 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:52,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:52,340 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-09-17 14:57:52,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:52,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206088845] [2020-09-17 14:57:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:52,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206088845] [2020-09-17 14:57:52,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183610628] [2020-09-17 14:57:52,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:52,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 14:57:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:52,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:52,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:52,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [197995676] [2020-09-17 14:57:52,651 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:52,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:52,657 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:52,657 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:52,659 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:52,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:52,706 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:52,707 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:52,720 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:52,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:52,721 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-09-17 14:57:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:53,680 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-09-17 14:57:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:57:53,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:53,682 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:57:53,682 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:57:53,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:57:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:57:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-09-17 14:57:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:57:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-09-17 14:57:53,686 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-09-17 14:57:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:53,686 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-09-17 14:57:53,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-09-17 14:57:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 14:57:53,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:53,687 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:53,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 14:57:53,896 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-09-17 14:57:53,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046611159] [2020-09-17 14:57:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:54,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046611159] [2020-09-17 14:57:54,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414313461] [2020-09-17 14:57:54,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:54,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:57:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 14:57:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:54,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:54,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 14:57:54,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457464502] [2020-09-17 14:57:54,169 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:54,170 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:54,174 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-17 14:57:54,174 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:54,176 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,176 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,216 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:54,217 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:54,227 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:57:54,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:57:54,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:57:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:57:54,228 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-09-17 14:57:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:55,233 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-09-17 14:57:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 14:57:55,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 14:57:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:55,234 INFO L225 Difference]: With dead ends: 106 [2020-09-17 14:57:55,235 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 14:57:55,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=690, Invalid=1472, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:57:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 14:57:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-09-17 14:57:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:57:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 14:57:55,238 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-09-17 14:57:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:55,238 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 14:57:55,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:57:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 14:57:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:57:55,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:55,239 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:55,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:55,440 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-09-17 14:57:55,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:55,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022000183] [2020-09-17 14:57:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:55,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022000183] [2020-09-17 14:57:55,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591235747] [2020-09-17 14:57:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:57:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:55,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:55,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:57:55,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [354081280] [2020-09-17 14:57:55,821 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:55,824 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:55,829 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-17 14:57:55,829 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:55,838 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:55,838 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:55,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:55,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:55,898 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:57:55,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:57:55,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:57:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:57:55,900 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-09-17 14:57:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:56,451 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-09-17 14:57:56,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:57:56,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:57:56,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:56,453 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:57:56,453 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:57:56,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 14:57:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:57:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-09-17 14:57:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 14:57:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-09-17 14:57:56,457 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-09-17 14:57:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:56,457 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-09-17 14:57:56,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:57:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-09-17 14:57:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:57:56,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:56,458 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:56,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:56,659 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-09-17 14:57:56,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:56,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462045049] [2020-09-17 14:57:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:56,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462045049] [2020-09-17 14:57:56,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701081651] [2020-09-17 14:57:56,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:56,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:57:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:57:56,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:57,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:57,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:57:57,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [554017445] [2020-09-17 14:57:57,020 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:57,022 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:57,027 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:57:57,028 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:57,028 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:57,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:57,073 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:57,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:57,087 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:57:57,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:57:57,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:57:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:57:57,088 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-09-17 14:57:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:57,756 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-09-17 14:57:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:57:57,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:57:57,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:57,758 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:57:57,758 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:57:57,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 14:57:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:57:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-09-17 14:57:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 14:57:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-09-17 14:57:57,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-09-17 14:57:57,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:57,762 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-09-17 14:57:57,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:57:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-09-17 14:57:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:57:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:57,763 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:57,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:57,964 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-09-17 14:57:57,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:57,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243094941] [2020-09-17 14:57:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:58,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243094941] [2020-09-17 14:57:58,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048502954] [2020-09-17 14:57:58,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:58,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:57:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:57:58,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:58,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:58,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:57:58,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117051703] [2020-09-17 14:57:58,297 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:58,299 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:58,303 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:57:58,303 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:58,305 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:58,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:58,353 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:58,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:58,366 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:57:58,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:57:58,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:57:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:57:58,368 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-09-17 14:57:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:57:59,107 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-09-17 14:57:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:57:59,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:57:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:57:59,109 INFO L225 Difference]: With dead ends: 97 [2020-09-17 14:57:59,109 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 14:57:59,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:57:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 14:57:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-09-17 14:57:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:57:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-09-17 14:57:59,112 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-09-17 14:57:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:57:59,112 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-09-17 14:57:59,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:57:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-09-17 14:57:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:57:59,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:57:59,112 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:57:59,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:59,313 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:57:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:57:59,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-09-17 14:57:59,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:57:59,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539474173] [2020-09-17 14:57:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:57:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:57:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:59,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539474173] [2020-09-17 14:57:59,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143951485] [2020-09-17 14:57:59,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:57:59,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:57:59,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:57:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:57:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:57:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:57:59,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:57:59,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:57:59,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1265082929] [2020-09-17 14:57:59,651 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:57:59,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:57:59,657 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:57:59,658 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:57:59,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:59,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:59,709 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:57:59,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:57:59,723 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:57:59,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:57:59,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:57:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:57:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:57:59,724 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-09-17 14:58:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:00,609 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-09-17 14:58:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:00,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:00,611 INFO L225 Difference]: With dead ends: 95 [2020-09-17 14:58:00,612 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 14:58:00,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:58:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 14:58:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-09-17 14:58:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 14:58:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-09-17 14:58:00,616 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-09-17 14:58:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:00,616 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-09-17 14:58:00,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-09-17 14:58:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:00,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:00,617 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:00,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 14:58:00,818 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:00,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:00,819 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-09-17 14:58:00,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:00,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252362827] [2020-09-17 14:58:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252362827] [2020-09-17 14:58:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335245975] [2020-09-17 14:58:01,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:01,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 14:58:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:01,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:01,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:01,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:01,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [90830812] [2020-09-17 14:58:01,159 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:01,161 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:01,165 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:01,165 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:01,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:01,168 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:01,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:01,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:01,236 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:58:01,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:01,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:01,237 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-09-17 14:58:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:02,230 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-09-17 14:58:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:02,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:02,232 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:02,232 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:02,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-09-17 14:58:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-09-17 14:58:02,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-09-17 14:58:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:02,235 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-09-17 14:58:02,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-09-17 14:58:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:02,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:02,236 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:02,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:02,438 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-09-17 14:58:02,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:02,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267290029] [2020-09-17 14:58:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:02,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267290029] [2020-09-17 14:58:02,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362038765] [2020-09-17 14:58:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:02,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:58:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:02,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:02,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:02,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [932392702] [2020-09-17 14:58:02,797 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:02,800 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:02,807 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:02,807 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:02,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:02,809 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:02,850 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:02,850 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:02,865 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:58:02,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:02,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:02,866 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-09-17 14:58:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:03,925 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-09-17 14:58:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:03,926 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:03,927 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:03,927 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:03,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-09-17 14:58:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-09-17 14:58:03,930 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-09-17 14:58:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:03,930 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-09-17 14:58:03,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-09-17 14:58:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:58:03,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:03,931 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:04,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 14:58:04,132 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:04,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-09-17 14:58:04,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:04,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589860352] [2020-09-17 14:58:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:04,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589860352] [2020-09-17 14:58:04,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082864638] [2020-09-17 14:58:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:58:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:04,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:04,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 14:58:04,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1999932193] [2020-09-17 14:58:04,465 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:04,467 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:04,473 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-17 14:58:04,473 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:04,474 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:04,474 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:04,520 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:04,520 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:04,539 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:58:04,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:58:04,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:04,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:58:04,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:58:04,541 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-09-17 14:58:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:05,699 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-09-17 14:58:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 14:58:05,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 14:58:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:05,701 INFO L225 Difference]: With dead ends: 93 [2020-09-17 14:58:05,701 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 14:58:05,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 14:58:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-09-17 14:58:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:58:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 14:58:05,703 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-09-17 14:58:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:05,705 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 14:58:05,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:58:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 14:58:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:05,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:05,706 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:05,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 14:58:05,907 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-09-17 14:58:05,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:05,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340045432] [2020-09-17 14:58:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:06,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340045432] [2020-09-17 14:58:06,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198302291] [2020-09-17 14:58:06,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:06,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:06,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:06,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:06,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:06,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [45500383] [2020-09-17 14:58:06,429 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:06,434 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:06,444 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-09-17 14:58:06,445 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:06,450 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,502 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,537 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,537 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,553 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,553 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,567 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,567 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,609 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,610 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,627 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:06,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:06,644 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:58:06,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:06,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:06,646 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-09-17 14:58:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:07,370 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-09-17 14:58:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:58:07,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:07,371 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:58:07,372 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 14:58:07,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 14:58:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 14:58:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 14:58:07,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:58:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 14:58:07,375 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-09-17 14:58:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:07,376 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 14:58:07,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 14:58:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:07,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:07,377 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:07,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:07,586 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-09-17 14:58:07,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:07,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286872559] [2020-09-17 14:58:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:07,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286872559] [2020-09-17 14:58:07,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270587987] [2020-09-17 14:58:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:07,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:07,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:07,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:07,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1232807707] [2020-09-17 14:58:07,967 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:07,969 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:07,973 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:07,973 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:07,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:07,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:08,018 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:08,019 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:08,038 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:58:08,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:08,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:08,039 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-09-17 14:58:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:08,760 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-09-17 14:58:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:08,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:08,762 INFO L225 Difference]: With dead ends: 122 [2020-09-17 14:58:08,762 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 14:58:08,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:58:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 14:58:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-09-17 14:58:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 14:58:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-09-17 14:58:08,764 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-09-17 14:58:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:08,764 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-09-17 14:58:08,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-09-17 14:58:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:08,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:08,765 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:08,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 14:58:08,968 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-09-17 14:58:08,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:08,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386744805] [2020-09-17 14:58:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:09,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386744805] [2020-09-17 14:58:09,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594965620] [2020-09-17 14:58:09,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:09,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:09,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:09,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:09,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:09,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:09,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:09,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1258157585] [2020-09-17 14:58:09,362 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:09,366 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:09,374 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:09,374 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:09,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:09,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:09,433 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:09,433 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:09,481 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:58:09,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:09,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:09,482 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-09-17 14:58:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:10,209 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-09-17 14:58:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:10,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:10,211 INFO L225 Difference]: With dead ends: 119 [2020-09-17 14:58:10,211 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 14:58:10,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=473, Invalid=1333, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 14:58:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 14:58:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-09-17 14:58:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:58:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-09-17 14:58:10,216 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-09-17 14:58:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:10,217 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-09-17 14:58:10,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-09-17 14:58:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:10,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:10,217 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:10,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:10,418 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-09-17 14:58:10,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:10,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670594054] [2020-09-17 14:58:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:10,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670594054] [2020-09-17 14:58:10,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244363103] [2020-09-17 14:58:10,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:10,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:10,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:10,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:10,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:10,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:10,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [585390114] [2020-09-17 14:58:10,824 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:10,828 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:10,834 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:10,835 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:10,838 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:10,838 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:10,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:10,889 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:10,902 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:58:10,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:10,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:10,903 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-09-17 14:58:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:11,777 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-09-17 14:58:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:11,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:11,779 INFO L225 Difference]: With dead ends: 117 [2020-09-17 14:58:11,779 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 14:58:11,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:58:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 14:58:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-09-17 14:58:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:58:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-09-17 14:58:11,782 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-09-17 14:58:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:11,782 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-09-17 14:58:11,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-09-17 14:58:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:11,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:11,783 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:11,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-17 14:58:11,985 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-09-17 14:58:11,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:11,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294058613] [2020-09-17 14:58:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294058613] [2020-09-17 14:58:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400586444] [2020-09-17 14:58:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:12,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 14:58:12,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:12,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:12,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:12,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:12,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1178311288] [2020-09-17 14:58:12,343 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:12,346 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:12,350 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:12,350 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:12,351 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,351 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,395 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:12,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:12,408 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:58:12,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:12,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:12,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:12,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:12,409 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-09-17 14:58:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:13,421 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-09-17 14:58:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:13,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:13,424 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:58:13,424 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:58:13,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:58:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:58:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-09-17 14:58:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:58:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-09-17 14:58:13,428 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-09-17 14:58:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:13,428 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-09-17 14:58:13,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-09-17 14:58:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:13,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:13,429 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:13,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:13,635 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-09-17 14:58:13,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:13,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26356300] [2020-09-17 14:58:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:13,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26356300] [2020-09-17 14:58:13,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863378780] [2020-09-17 14:58:13,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:13,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:13,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [224701505] [2020-09-17 14:58:13,973 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:13,977 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:13,983 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:13,984 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:13,987 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:13,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:14,024 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:14,025 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:14,038 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:58:14,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:14,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:14,040 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-09-17 14:58:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:15,039 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-09-17 14:58:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:15,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:15,041 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:15,041 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:15,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=1684, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:58:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-09-17 14:58:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:58:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-09-17 14:58:15,045 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-09-17 14:58:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:15,045 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-09-17 14:58:15,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-09-17 14:58:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:15,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:15,046 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:15,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 14:58:15,247 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:15,248 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-09-17 14:58:15,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:15,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53103226] [2020-09-17 14:58:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:15,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53103226] [2020-09-17 14:58:15,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726848642] [2020-09-17 14:58:15,502 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 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 [2020-09-17 14:58:15,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:15,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:15,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:15,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1210403606] [2020-09-17 14:58:15,591 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:15,593 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:15,597 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:15,598 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:15,600 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:15,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:15,642 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:15,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:15,653 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:58:15,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:15,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:15,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:15,654 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-09-17 14:58:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:16,826 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 14:58:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:16,827 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:16,828 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:16,828 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:16,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:58:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-09-17 14:58:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:58:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-09-17 14:58:16,832 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-09-17 14:58:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:16,832 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-09-17 14:58:16,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-09-17 14:58:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 14:58:16,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:16,833 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:17,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:17,036 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-09-17 14:58:17,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:17,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433133690] [2020-09-17 14:58:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433133690] [2020-09-17 14:58:17,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234756255] [2020-09-17 14:58:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:17,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:17,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 14:58:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:17,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:17,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 14:58:17,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [789591614] [2020-09-17 14:58:17,378 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:17,381 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:17,385 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-17 14:58:17,386 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:17,388 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:17,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:17,432 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:17,433 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:17,443 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:58:17,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:58:17,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:58:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:58:17,444 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-09-17 14:58:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:18,611 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-17 14:58:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 14:58:18,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 14:58:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:18,612 INFO L225 Difference]: With dead ends: 114 [2020-09-17 14:58:18,613 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 14:58:18,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=876, Invalid=1880, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:58:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 14:58:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-09-17 14:58:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:58:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 14:58:18,616 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-09-17 14:58:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:18,616 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 14:58:18,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:58:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 14:58:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:18,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:18,617 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:18,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 14:58:18,818 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:18,819 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-09-17 14:58:18,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:18,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114058622] [2020-09-17 14:58:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:19,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114058622] [2020-09-17 14:58:19,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636088513] [2020-09-17 14:58:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:19,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:19,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:19,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:19,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:19,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:19,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1209457483] [2020-09-17 14:58:19,276 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:19,279 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:19,286 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-09-17 14:58:19,286 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:19,291 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:19,292 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:19,342 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:19,342 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:19,356 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:58:19,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:19,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:19,357 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-09-17 14:58:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:20,034 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-09-17 14:58:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:58:20,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:20,036 INFO L225 Difference]: With dead ends: 110 [2020-09-17 14:58:20,036 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 14:58:20,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 14:58:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 14:58:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-09-17 14:58:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 14:58:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-09-17 14:58:20,040 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-09-17 14:58:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:20,040 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-09-17 14:58:20,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-09-17 14:58:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:20,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:20,041 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:20,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:20,243 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:20,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-09-17 14:58:20,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:20,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129104266] [2020-09-17 14:58:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:20,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129104266] [2020-09-17 14:58:20,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220363530] [2020-09-17 14:58:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:20,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:20,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:20,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:20,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:20,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:20,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:20,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [284140627] [2020-09-17 14:58:20,674 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:20,688 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:20,700 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:20,701 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:20,712 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:20,713 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:20,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:20,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:20,781 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:58:20,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:20,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:20,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:20,783 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-09-17 14:58:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:21,526 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-17 14:58:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:21,527 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:21,529 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:58:21,529 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:58:21,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 14:58:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:58:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-09-17 14:58:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 14:58:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-09-17 14:58:21,532 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-09-17 14:58:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:21,533 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-09-17 14:58:21,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-09-17 14:58:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:21,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:21,533 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:21,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 14:58:21,739 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-09-17 14:58:21,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:21,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665128279] [2020-09-17 14:58:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:22,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665128279] [2020-09-17 14:58:22,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793767023] [2020-09-17 14:58:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:22,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 14:58:22,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:22,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:22,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:22,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:22,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2112696568] [2020-09-17 14:58:22,151 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:22,154 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:22,160 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:22,160 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:22,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:22,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:22,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:22,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:22,224 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:58:22,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:22,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:22,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:22,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:22,225 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-09-17 14:58:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:23,076 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-17 14:58:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:23,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:23,078 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:58:23,078 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:58:23,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:58:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-09-17 14:58:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-09-17 14:58:23,081 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-09-17 14:58:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:23,081 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-09-17 14:58:23,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-09-17 14:58:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:23,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:23,082 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:23,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-17 14:58:23,283 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-09-17 14:58:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:23,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308176838] [2020-09-17 14:58:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:23,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308176838] [2020-09-17 14:58:23,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735128] [2020-09-17 14:58:23,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:23,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:23,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:23,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834719722] [2020-09-17 14:58:23,683 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:23,685 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:23,704 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:23,704 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:23,706 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:23,706 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:23,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:23,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:23,764 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:58:23,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:23,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:23,765 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-09-17 14:58:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:24,715 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-09-17 14:58:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:24,716 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:24,717 INFO L225 Difference]: With dead ends: 103 [2020-09-17 14:58:24,717 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 14:58:24,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 14:58:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-09-17 14:58:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-09-17 14:58:24,721 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-09-17 14:58:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:24,721 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-09-17 14:58:24,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-09-17 14:58:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:24,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:24,722 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:24,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 14:58:24,930 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-09-17 14:58:24,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:24,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246023653] [2020-09-17 14:58:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:25,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246023653] [2020-09-17 14:58:25,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211484390] [2020-09-17 14:58:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:25,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:25,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:25,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:25,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1880105551] [2020-09-17 14:58:25,290 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:25,292 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:25,297 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:25,297 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:25,299 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:25,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:25,353 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:25,353 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:25,365 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:58:25,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:25,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:25,366 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-09-17 14:58:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:26,477 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-09-17 14:58:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:26,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:26,480 INFO L225 Difference]: With dead ends: 101 [2020-09-17 14:58:26,480 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 14:58:26,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 14:58:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-09-17 14:58:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:58:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-09-17 14:58:26,483 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-09-17 14:58:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:26,484 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-09-17 14:58:26,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-09-17 14:58:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:26,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:26,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:26,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:26,685 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:26,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-09-17 14:58:26,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:26,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753166098] [2020-09-17 14:58:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:26,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753166098] [2020-09-17 14:58:26,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034796077] [2020-09-17 14:58:26,981 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 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 [2020-09-17 14:58:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 14:58:27,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:27,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:27,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:27,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:27,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [35476327] [2020-09-17 14:58:27,079 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:27,081 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:27,086 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:27,086 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:27,088 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:27,088 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:27,133 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:27,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:27,147 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:58:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:27,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:27,149 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-09-17 14:58:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:28,376 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-09-17 14:58:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:28,377 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:28,378 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:28,378 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:58:28,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:58:28,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:58:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-09-17 14:58:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:58:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-09-17 14:58:28,382 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-09-17 14:58:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:28,382 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-09-17 14:58:28,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-09-17 14:58:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:28,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:28,383 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:28,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:28,593 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-09-17 14:58:28,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:28,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741448199] [2020-09-17 14:58:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:28,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741448199] [2020-09-17 14:58:28,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896018668] [2020-09-17 14:58:28,866 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 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 [2020-09-17 14:58:28,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:28,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:28,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:28,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:28,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:28,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451345990] [2020-09-17 14:58:28,965 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:28,967 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:28,975 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:28,975 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:28,978 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:28,978 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:29,033 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:29,034 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:29,050 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:58:29,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:29,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:29,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:29,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:29,052 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-09-17 14:58:30,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:30,398 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-09-17 14:58:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:30,400 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:30,400 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:30,401 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:58:30,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:58:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:58:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-09-17 14:58:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:58:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-09-17 14:58:30,406 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-09-17 14:58:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:30,406 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-09-17 14:58:30,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-09-17 14:58:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 14:58:30,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:30,407 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:30,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:30,618 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-09-17 14:58:30,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:30,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894406666] [2020-09-17 14:58:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:30,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894406666] [2020-09-17 14:58:30,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190364936] [2020-09-17 14:58:30,917 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 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 [2020-09-17 14:58:30,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 14:58:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 14:58:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:31,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:31,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 14:58:31,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1870781917] [2020-09-17 14:58:31,009 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:31,010 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:31,016 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-17 14:58:31,016 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:31,018 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:31,018 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:31,068 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:31,068 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:31,089 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 14:58:31,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:58:31,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:31,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:58:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:58:31,090 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-09-17 14:58:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:32,511 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-09-17 14:58:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 14:58:32,512 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 14:58:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:32,513 INFO L225 Difference]: With dead ends: 99 [2020-09-17 14:58:32,513 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 14:58:32,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:58:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 14:58:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-09-17 14:58:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 14:58:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 14:58:32,517 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-09-17 14:58:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:32,517 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 14:58:32,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:58:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 14:58:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:32,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:32,518 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:32,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-17 14:58:32,719 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:32,720 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-09-17 14:58:32,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:32,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34268949] [2020-09-17 14:58:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:33,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34268949] [2020-09-17 14:58:33,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103883337] [2020-09-17 14:58:33,102 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 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 [2020-09-17 14:58:33,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:33,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:33,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:33,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:33,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1133609130] [2020-09-17 14:58:33,185 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:33,187 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:33,193 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-09-17 14:58:33,193 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:33,194 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,194 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,235 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,235 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,275 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,275 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,289 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,297 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,323 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,324 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:33,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:33,343 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:58:33,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:33,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:33,345 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-09-17 14:58:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:34,016 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-09-17 14:58:34,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:34,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:34,018 INFO L225 Difference]: With dead ends: 96 [2020-09-17 14:58:34,018 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 14:58:34,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=476, Invalid=1164, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 14:58:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 14:58:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 14:58:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:58:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 14:58:34,021 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-09-17 14:58:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:34,021 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 14:58:34,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 14:58:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:34,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:34,022 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:34,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:34,223 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-09-17 14:58:34,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:34,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222198323] [2020-09-17 14:58:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:34,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222198323] [2020-09-17 14:58:34,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878131037] [2020-09-17 14:58:34,582 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 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 [2020-09-17 14:58:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:34,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:34,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:34,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1631147402] [2020-09-17 14:58:34,661 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:34,664 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:34,671 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:34,671 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:34,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:34,679 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:34,725 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:34,726 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:34,737 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:58:34,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:34,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:34,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:34,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:34,739 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-09-17 14:58:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:35,610 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-09-17 14:58:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:35,611 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:35,613 INFO L225 Difference]: With dead ends: 132 [2020-09-17 14:58:35,613 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 14:58:35,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:58:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 14:58:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-09-17 14:58:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 14:58:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-09-17 14:58:35,617 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-09-17 14:58:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:35,617 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-09-17 14:58:35,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-09-17 14:58:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:35,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:35,618 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:35,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:35,819 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:35,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-09-17 14:58:35,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:35,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074672179] [2020-09-17 14:58:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:36,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074672179] [2020-09-17 14:58:36,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795944826] [2020-09-17 14:58:36,200 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 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 [2020-09-17 14:58:36,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:36,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:36,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:36,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:36,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1230333463] [2020-09-17 14:58:36,287 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:36,289 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:36,294 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:36,294 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:36,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:36,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:36,344 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:36,345 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:36,362 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:58:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:36,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:36,363 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-09-17 14:58:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:37,376 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-09-17 14:58:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:37,377 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:37,378 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:58:37,378 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:58:37,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 14:58:37,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:58:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-09-17 14:58:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:58:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-09-17 14:58:37,382 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-09-17 14:58:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:37,382 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-09-17 14:58:37,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-09-17 14:58:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:37,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:37,383 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:37,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:37,594 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-09-17 14:58:37,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:37,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426844623] [2020-09-17 14:58:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:37,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426844623] [2020-09-17 14:58:37,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670133179] [2020-09-17 14:58:37,959 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 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 [2020-09-17 14:58:38,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:58:38,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:38,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:38,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:38,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1418362928] [2020-09-17 14:58:38,052 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:38,054 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:38,059 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:38,060 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:38,060 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:38,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:38,110 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:38,110 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:38,126 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:58:38,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:38,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:38,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:38,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:38,127 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-09-17 14:58:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:39,266 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-09-17 14:58:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:39,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:39,269 INFO L225 Difference]: With dead ends: 127 [2020-09-17 14:58:39,269 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 14:58:39,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:58:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 14:58:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-09-17 14:58:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:58:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-09-17 14:58:39,273 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-09-17 14:58:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:39,273 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-09-17 14:58:39,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-09-17 14:58:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:39,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:39,274 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:39,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 14:58:39,475 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:39,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:39,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-09-17 14:58:39,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:39,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173228323] [2020-09-17 14:58:39,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:39,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173228323] [2020-09-17 14:58:39,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952220193] [2020-09-17 14:58:39,829 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 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 [2020-09-17 14:58:39,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:39,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:39,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:39,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:39,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:39,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [495853661] [2020-09-17 14:58:39,923 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:39,925 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:39,931 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:39,931 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:39,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:39,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:39,981 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:39,981 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:39,995 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:58:39,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:39,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:39,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:39,996 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-09-17 14:58:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:41,207 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-09-17 14:58:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:41,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:41,209 INFO L225 Difference]: With dead ends: 125 [2020-09-17 14:58:41,209 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 14:58:41,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:58:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 14:58:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-09-17 14:58:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:58:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-09-17 14:58:41,213 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-09-17 14:58:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:41,213 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-09-17 14:58:41,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-09-17 14:58:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:41,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:41,214 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:41,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:41,415 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-09-17 14:58:41,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:41,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904194774] [2020-09-17 14:58:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:41,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904194774] [2020-09-17 14:58:41,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774826913] [2020-09-17 14:58:41,755 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 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 [2020-09-17 14:58:41,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:58:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:41,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:41,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:41,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:41,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [862039221] [2020-09-17 14:58:41,843 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:41,846 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:41,852 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:41,853 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:41,856 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:41,856 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:41,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:41,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:41,918 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:58:41,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:41,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:41,920 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-09-17 14:58:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:43,209 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-09-17 14:58:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:58:43,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:43,212 INFO L225 Difference]: With dead ends: 123 [2020-09-17 14:58:43,212 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 14:58:43,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:58:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 14:58:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-09-17 14:58:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:58:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-09-17 14:58:43,215 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-09-17 14:58:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:43,216 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-09-17 14:58:43,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-09-17 14:58:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:43,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:43,217 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:43,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:43,427 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:43,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:43,428 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-09-17 14:58:43,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:43,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532573421] [2020-09-17 14:58:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:43,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532573421] [2020-09-17 14:58:43,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915751244] [2020-09-17 14:58:43,782 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 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 [2020-09-17 14:58:43,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:43,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:43,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:43,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:43,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1004616634] [2020-09-17 14:58:43,885 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:43,887 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:43,892 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:43,892 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:43,895 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:43,895 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:43,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:43,942 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:43,952 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:58:43,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:43,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:43,954 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-09-17 14:58:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:45,367 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-09-17 14:58:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:58:45,368 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:45,369 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:58:45,369 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:58:45,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 14:58:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:58:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-09-17 14:58:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 14:58:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-09-17 14:58:45,373 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-09-17 14:58:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:45,373 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-09-17 14:58:45,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-09-17 14:58:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:45,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:45,374 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:45,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-17 14:58:45,575 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-09-17 14:58:45,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:45,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970968867] [2020-09-17 14:58:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970968867] [2020-09-17 14:58:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441564548] [2020-09-17 14:58:45,947 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 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 [2020-09-17 14:58:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:46,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:46,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:46,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192652234] [2020-09-17 14:58:46,074 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:46,079 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:46,089 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:46,089 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:46,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:46,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:46,152 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:46,153 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:46,171 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:58:46,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:46,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:46,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:46,173 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-09-17 14:58:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:48,131 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-09-17 14:58:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:58:48,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:48,133 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:58:48,133 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:58:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:58:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:58:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-09-17 14:58:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 14:58:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-09-17 14:58:48,137 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-09-17 14:58:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:48,137 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-09-17 14:58:48,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-09-17 14:58:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:58:48,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:48,138 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:48,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:48,347 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-09-17 14:58:48,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:48,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816811042] [2020-09-17 14:58:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:48,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816811042] [2020-09-17 14:58:48,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893636916] [2020-09-17 14:58:48,635 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 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 [2020-09-17 14:58:48,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:58:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:48,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:48,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 14:58:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [411603840] [2020-09-17 14:58:48,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:48,741 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:48,749 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-17 14:58:48,750 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:48,764 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:48,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:48,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:48,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:48,819 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:58:48,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 14:58:48,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 14:58:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:58:48,821 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-09-17 14:58:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:50,222 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-09-17 14:58:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 14:58:50,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 14:58:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:50,225 INFO L225 Difference]: With dead ends: 122 [2020-09-17 14:58:50,225 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 14:58:50,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 14:58:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 14:58:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-09-17 14:58:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:58:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 14:58:50,228 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-09-17 14:58:50,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:50,228 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 14:58:50,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 14:58:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 14:58:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:50,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:50,228 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:50,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:50,430 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-09-17 14:58:50,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:50,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032621059] [2020-09-17 14:58:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:50,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032621059] [2020-09-17 14:58:50,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177750362] [2020-09-17 14:58:50,855 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 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 [2020-09-17 14:58:50,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:58:50,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:50,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:50,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:50,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:50,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1934954258] [2020-09-17 14:58:50,941 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:50,943 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:50,949 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-09-17 14:58:50,949 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:50,950 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:50,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:51,000 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:51,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:51,017 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:58:51,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:51,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:51,018 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-09-17 14:58:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:51,835 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-09-17 14:58:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 14:58:51,836 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:51,837 INFO L225 Difference]: With dead ends: 118 [2020-09-17 14:58:51,837 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 14:58:51,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 14:58:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 14:58:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-09-17 14:58:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 14:58:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-09-17 14:58:51,840 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-09-17 14:58:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:51,840 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-09-17 14:58:51,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-09-17 14:58:51,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:51,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:51,840 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:52,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:52,043 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-09-17 14:58:52,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:52,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591445907] [2020-09-17 14:58:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:52,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591445907] [2020-09-17 14:58:52,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827339693] [2020-09-17 14:58:52,458 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 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 [2020-09-17 14:58:52,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:58:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:52,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:52,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:52,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1950835659] [2020-09-17 14:58:52,550 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:52,552 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:52,558 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:52,558 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:52,560 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:52,561 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:52,610 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:52,610 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:52,625 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:58:52,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:52,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:52,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:52,627 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-09-17 14:58:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:53,554 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-09-17 14:58:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:58:53,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:53,556 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:58:53,556 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:58:53,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 14:58:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:58:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-09-17 14:58:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 14:58:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-09-17 14:58:53,558 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-09-17 14:58:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:53,559 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-09-17 14:58:53,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-09-17 14:58:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:53,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:53,559 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:53,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:53,760 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:53,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-09-17 14:58:53,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:53,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993081684] [2020-09-17 14:58:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:54,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993081684] [2020-09-17 14:58:54,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970774434] [2020-09-17 14:58:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:58:54,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:58:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:54,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:54,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:54,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1850169555] [2020-09-17 14:58:54,219 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:54,221 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:54,227 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:54,227 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:54,228 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:54,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:54,277 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:54,277 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:54,290 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:58:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:54,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:54,291 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-09-17 14:58:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:55,323 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-09-17 14:58:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:58:55,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:55,325 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:58:55,325 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:58:55,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:58:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:58:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-09-17 14:58:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:58:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-09-17 14:58:55,329 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-09-17 14:58:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:55,330 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-09-17 14:58:55,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-09-17 14:58:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:55,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:55,331 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:55,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:55,541 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-09-17 14:58:55,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:55,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058332507] [2020-09-17 14:58:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:55,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058332507] [2020-09-17 14:58:55,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44214082] [2020-09-17 14:58:55,904 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 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 [2020-09-17 14:58:55,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 14:58:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:55,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:55,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:55,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:55,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:55,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [928177174] [2020-09-17 14:58:55,999 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:56,001 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:56,007 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:56,008 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:56,010 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:56,010 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:56,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:56,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:56,071 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:58:56,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:56,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:56,073 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-09-17 14:58:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:57,237 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-09-17 14:58:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:58:57,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:57,239 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:58:57,239 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:58:57,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:58:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:58:57,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-09-17 14:58:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:58:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-09-17 14:58:57,243 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-09-17 14:58:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:57,244 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-09-17 14:58:57,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-09-17 14:58:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:57,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:57,245 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:57,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:58:57,446 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-09-17 14:58:57,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:57,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390639168] [2020-09-17 14:58:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:57,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390639168] [2020-09-17 14:58:57,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321876397] [2020-09-17 14:58:57,846 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 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 [2020-09-17 14:58:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:57,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:57,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:57,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1646142675] [2020-09-17 14:58:57,943 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:57,945 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:57,951 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:57,952 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:57,954 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:57,954 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:58,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:58,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:58:58,029 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:58:58,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:58:58,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:58:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:58:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:58:58,031 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-09-17 14:58:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:58:59,322 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-09-17 14:58:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:58:59,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:58:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:58:59,324 INFO L225 Difference]: With dead ends: 109 [2020-09-17 14:58:59,324 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 14:58:59,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:58:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 14:58:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-09-17 14:58:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:58:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-09-17 14:58:59,327 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-09-17 14:58:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:58:59,328 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-09-17 14:58:59,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:58:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-09-17 14:58:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:58:59,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:58:59,328 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:58:59,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 14:58:59,529 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:58:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:58:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-09-17 14:58:59,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:58:59,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132691498] [2020-09-17 14:58:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:58:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:58:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:59,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132691498] [2020-09-17 14:58:59,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269941040] [2020-09-17 14:58:59,876 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 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 [2020-09-17 14:58:59,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:58:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:58:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:58:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:58:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:58:59,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:58:59,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:58:59,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605758758] [2020-09-17 14:58:59,961 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:58:59,964 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:58:59,969 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:58:59,969 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:58:59,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:58:59,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:00,023 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:00,023 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:00,036 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:59:00,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:00,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:00,037 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-09-17 14:59:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:01,415 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-09-17 14:59:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:01,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:01,417 INFO L225 Difference]: With dead ends: 107 [2020-09-17 14:59:01,417 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 14:59:01,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:59:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 14:59:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-09-17 14:59:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 14:59:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-09-17 14:59:01,420 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-09-17 14:59:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:01,420 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-09-17 14:59:01,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-09-17 14:59:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:01,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:01,421 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:01,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:01,626 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:01,626 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-09-17 14:59:01,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:01,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562775806] [2020-09-17 14:59:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:01,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562775806] [2020-09-17 14:59:01,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622687125] [2020-09-17 14:59:01,977 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 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 [2020-09-17 14:59:02,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:59:02,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:02,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:02,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:02,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1097072538] [2020-09-17 14:59:02,077 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:02,079 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:02,085 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:02,086 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:02,088 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:02,088 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:02,137 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:02,138 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:02,150 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:59:02,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:02,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:02,152 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-09-17 14:59:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:03,682 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-09-17 14:59:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:03,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:03,684 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:03,684 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:03,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 14:59:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-09-17 14:59:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 14:59:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-09-17 14:59:03,688 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-09-17 14:59:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:03,688 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-09-17 14:59:03,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-09-17 14:59:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:03,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:03,689 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:03,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 14:59:03,900 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-09-17 14:59:03,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:03,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584906926] [2020-09-17 14:59:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:04,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584906926] [2020-09-17 14:59:04,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204471710] [2020-09-17 14:59:04,325 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 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 [2020-09-17 14:59:04,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:04,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:04,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:04,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:04,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [979806785] [2020-09-17 14:59:04,463 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:04,469 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:04,481 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:04,481 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:04,484 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:04,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:04,551 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:04,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:04,566 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 14:59:04,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:04,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:04,568 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-09-17 14:59:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:06,247 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-09-17 14:59:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:06,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:06,249 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:06,249 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:06,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 14:59:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-09-17 14:59:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 14:59:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-09-17 14:59:06,253 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-09-17 14:59:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:06,253 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-09-17 14:59:06,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-09-17 14:59:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 14:59:06,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:06,255 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:06,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-17 14:59:06,466 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-09-17 14:59:06,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:06,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902947726] [2020-09-17 14:59:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:06,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902947726] [2020-09-17 14:59:06,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712583601] [2020-09-17 14:59:06,827 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 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 [2020-09-17 14:59:06,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 14:59:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 14:59:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:06,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:06,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 14:59:06,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489356585] [2020-09-17 14:59:06,929 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:06,931 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:06,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-17 14:59:06,938 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:06,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:06,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:06,993 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:06,993 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:07,007 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 14:59:07,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:59:07,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:59:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:59:07,008 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-09-17 14:59:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:08,747 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-09-17 14:59:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 14:59:08,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 14:59:08,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:08,750 INFO L225 Difference]: With dead ends: 105 [2020-09-17 14:59:08,750 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 14:59:08,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 14:59:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 14:59:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-09-17 14:59:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 14:59:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 14:59:08,753 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-09-17 14:59:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:08,753 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 14:59:08,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:59:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 14:59:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:08,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:08,754 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:08,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:08,964 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-09-17 14:59:08,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:08,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049804510] [2020-09-17 14:59:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:09,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049804510] [2020-09-17 14:59:09,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709867888] [2020-09-17 14:59:09,496 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 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 [2020-09-17 14:59:09,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:09,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:09,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:09,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:09,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2005692793] [2020-09-17 14:59:09,599 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:09,603 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:09,614 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-09-17 14:59:09,615 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:09,622 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,623 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,675 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,675 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,712 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,715 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,726 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,727 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,740 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,741 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,783 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,783 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:09,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:09,811 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:59:09,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:09,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:09,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:09,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:09,813 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-09-17 14:59:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:10,852 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-09-17 14:59:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:59:10,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:10,854 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:59:10,854 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 14:59:10,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 14:59:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 14:59:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 14:59:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 14:59:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 14:59:10,857 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-09-17 14:59:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:10,857 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 14:59:10,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 14:59:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:10,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:10,858 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:11,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:11,060 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-09-17 14:59:11,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:11,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206372156] [2020-09-17 14:59:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206372156] [2020-09-17 14:59:11,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530931014] [2020-09-17 14:59:11,674 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 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 [2020-09-17 14:59:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:11,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:11,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:11,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:11,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1291860118] [2020-09-17 14:59:11,777 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:11,781 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:11,798 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:11,799 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:11,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:11,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:11,864 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:11,864 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:11,879 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:59:11,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:11,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:11,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:11,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:11,880 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-09-17 14:59:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:12,978 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-09-17 14:59:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:12,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:12,981 INFO L225 Difference]: With dead ends: 142 [2020-09-17 14:59:12,981 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 14:59:12,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:59:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 14:59:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-09-17 14:59:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 14:59:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-09-17 14:59:12,984 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-09-17 14:59:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:12,984 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-09-17 14:59:12,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-09-17 14:59:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:12,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:12,984 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:13,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:13,185 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:13,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-09-17 14:59:13,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:13,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633765917] [2020-09-17 14:59:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:13,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633765917] [2020-09-17 14:59:13,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285007649] [2020-09-17 14:59:13,667 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 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 [2020-09-17 14:59:13,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:13,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:13,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:13,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:13,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:13,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1666637917] [2020-09-17 14:59:13,768 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:13,771 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:13,781 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:13,782 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:13,790 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:13,790 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:13,854 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:13,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:13,867 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:59:13,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:13,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:13,869 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-09-17 14:59:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:15,102 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-09-17 14:59:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:15,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:15,105 INFO L225 Difference]: With dead ends: 139 [2020-09-17 14:59:15,105 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 14:59:15,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 14:59:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 14:59:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-09-17 14:59:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:59:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-09-17 14:59:15,110 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-09-17 14:59:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:15,110 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-09-17 14:59:15,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-09-17 14:59:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:15,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:15,111 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:15,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-17 14:59:15,312 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-09-17 14:59:15,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:15,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293141704] [2020-09-17 14:59:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:15,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293141704] [2020-09-17 14:59:15,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059197171] [2020-09-17 14:59:15,720 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 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 [2020-09-17 14:59:15,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:15,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:15,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:15,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:15,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1267695790] [2020-09-17 14:59:15,826 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:15,829 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:15,837 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:15,838 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:15,841 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:15,842 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:15,890 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:15,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:15,901 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:59:15,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:15,902 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-09-17 14:59:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:17,147 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-09-17 14:59:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:17,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:17,149 INFO L225 Difference]: With dead ends: 137 [2020-09-17 14:59:17,149 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 14:59:17,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:59:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 14:59:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-09-17 14:59:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:59:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-09-17 14:59:17,152 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-09-17 14:59:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:17,153 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-09-17 14:59:17,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-09-17 14:59:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:17,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:17,153 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:17,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:17,354 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-09-17 14:59:17,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:17,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060271030] [2020-09-17 14:59:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060271030] [2020-09-17 14:59:17,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868138825] [2020-09-17 14:59:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 14:59:17,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:17,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:17,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:17,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1939515032] [2020-09-17 14:59:17,869 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:17,872 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:17,882 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:17,882 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:17,885 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:17,886 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:17,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:17,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:17,943 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:59:17,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:17,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:17,944 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-09-17 14:59:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:19,271 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-09-17 14:59:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:19,272 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:19,273 INFO L225 Difference]: With dead ends: 135 [2020-09-17 14:59:19,273 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 14:59:19,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 14:59:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 14:59:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-09-17 14:59:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 14:59:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-09-17 14:59:19,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-09-17 14:59:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:19,278 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-09-17 14:59:19,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-09-17 14:59:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:19,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:19,280 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:19,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 14:59:19,490 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:19,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:19,491 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-09-17 14:59:19,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:19,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52234373] [2020-09-17 14:59:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52234373] [2020-09-17 14:59:19,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252209406] [2020-09-17 14:59:19,964 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 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 [2020-09-17 14:59:20,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:20,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:20,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:20,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:20,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:20,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611310555] [2020-09-17 14:59:20,055 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:20,059 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:20,069 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:20,069 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:20,073 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:20,073 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:20,127 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:20,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:20,139 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:59:20,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:20,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:20,140 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-09-17 14:59:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:21,584 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-09-17 14:59:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:21,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:21,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:21,587 INFO L225 Difference]: With dead ends: 133 [2020-09-17 14:59:21,587 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 14:59:21,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:59:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 14:59:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-09-17 14:59:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 14:59:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-09-17 14:59:21,590 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-09-17 14:59:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:21,590 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-09-17 14:59:21,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-09-17 14:59:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:21,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:21,590 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:21,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:21,791 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-09-17 14:59:21,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:21,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277077123] [2020-09-17 14:59:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:22,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277077123] [2020-09-17 14:59:22,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912174977] [2020-09-17 14:59:22,192 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 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 [2020-09-17 14:59:22,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:22,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:22,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:22,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:22,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [862939916] [2020-09-17 14:59:22,293 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:22,294 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:22,303 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:22,304 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:22,304 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:22,305 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:22,358 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:22,358 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:22,371 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:59:22,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:22,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:22,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:22,373 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-09-17 14:59:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:23,889 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-09-17 14:59:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:23,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:23,891 INFO L225 Difference]: With dead ends: 131 [2020-09-17 14:59:23,892 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 14:59:23,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 14:59:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 14:59:23,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 14:59:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 14:59:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-09-17 14:59:23,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-09-17 14:59:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:23,896 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-09-17 14:59:23,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-09-17 14:59:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:23,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:23,897 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:24,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:24,107 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-09-17 14:59:24,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:24,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646096426] [2020-09-17 14:59:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:24,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646096426] [2020-09-17 14:59:24,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204643595] [2020-09-17 14:59:24,493 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 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 [2020-09-17 14:59:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:24,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:24,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:24,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:24,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242520297] [2020-09-17 14:59:24,584 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:24,586 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:24,592 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:24,592 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:24,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:24,596 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:24,646 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:24,646 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:24,657 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:59:24,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:24,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:24,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:24,658 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-09-17 14:59:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:26,257 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-09-17 14:59:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 14:59:26,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:26,259 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:59:26,259 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:59:26,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 14:59:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:59:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-09-17 14:59:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 14:59:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-09-17 14:59:26,262 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-09-17 14:59:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:26,263 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-09-17 14:59:26,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-09-17 14:59:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:26,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:26,263 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:26,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-17 14:59:26,464 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-09-17 14:59:26,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:26,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592362899] [2020-09-17 14:59:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:26,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592362899] [2020-09-17 14:59:26,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389025916] [2020-09-17 14:59:26,843 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 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 [2020-09-17 14:59:26,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:26,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:26,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:26,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:26,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:26,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048007662] [2020-09-17 14:59:26,936 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:26,937 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:26,943 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:26,943 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:26,944 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:26,944 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:26,993 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:26,993 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:27,006 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:59:27,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:27,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:27,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:27,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:27,007 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-09-17 14:59:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:28,711 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-17 14:59:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 14:59:28,713 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:28,713 INFO L225 Difference]: With dead ends: 129 [2020-09-17 14:59:28,714 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 14:59:28,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 14:59:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 14:59:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-09-17 14:59:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 14:59:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-09-17 14:59:28,718 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-09-17 14:59:28,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:28,718 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-09-17 14:59:28,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:28,718 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-09-17 14:59:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 14:59:28,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:28,719 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:28,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-17 14:59:28,921 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:28,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-09-17 14:59:28,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:28,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084889675] [2020-09-17 14:59:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:29,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084889675] [2020-09-17 14:59:29,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4050760] [2020-09-17 14:59:29,310 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:29,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 14:59:29,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:29,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:29,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 14:59:29,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [633675933] [2020-09-17 14:59:29,420 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:29,422 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:29,429 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-17 14:59:29,429 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:29,431 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:29,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:29,488 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:29,488 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:29,500 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 14:59:29,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 14:59:29,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:29,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 14:59:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:59:29,501 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-09-17 14:59:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:31,286 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-17 14:59:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 14:59:31,287 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 14:59:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:31,288 INFO L225 Difference]: With dead ends: 130 [2020-09-17 14:59:31,288 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 14:59:31,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 14:59:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 14:59:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-09-17 14:59:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:59:31,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 14:59:31,292 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-09-17 14:59:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:31,292 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 14:59:31,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 14:59:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 14:59:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:31,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:31,293 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:31,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:31,498 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-09-17 14:59:31,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:31,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5867198] [2020-09-17 14:59:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:32,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5867198] [2020-09-17 14:59:32,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147628600] [2020-09-17 14:59:32,025 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:32,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:32,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:32,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:32,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:32,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:32,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2009236040] [2020-09-17 14:59:32,110 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:32,111 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:32,118 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-09-17 14:59:32,118 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:32,119 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:32,120 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:32,175 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:32,176 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:32,192 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 14:59:32,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:32,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:32,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:32,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:32,194 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-09-17 14:59:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:33,188 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-09-17 14:59:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 14:59:33,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:33,190 INFO L225 Difference]: With dead ends: 126 [2020-09-17 14:59:33,190 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 14:59:33,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 14:59:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 14:59:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-09-17 14:59:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 14:59:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-17 14:59:33,194 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-09-17 14:59:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:33,194 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-17 14:59:33,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-17 14:59:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:33,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:33,195 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:33,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 14:59:33,402 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-09-17 14:59:33,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:33,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121826895] [2020-09-17 14:59:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:33,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121826895] [2020-09-17 14:59:33,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60960993] [2020-09-17 14:59:33,895 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:33,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:33,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:33,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:33,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:33,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462407693] [2020-09-17 14:59:33,994 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:33,996 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:34,005 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:34,006 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:34,007 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:34,007 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:34,065 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:34,065 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:34,079 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 14:59:34,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:34,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:34,081 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-09-17 14:59:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:35,160 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-09-17 14:59:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:35,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:35,162 INFO L225 Difference]: With dead ends: 123 [2020-09-17 14:59:35,163 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 14:59:35,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 14:59:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 14:59:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 14:59:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 14:59:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-09-17 14:59:35,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-09-17 14:59:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:35,166 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-09-17 14:59:35,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-09-17 14:59:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:35,166 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:35,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-17 14:59:35,367 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-09-17 14:59:35,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:35,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246481020] [2020-09-17 14:59:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:35,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246481020] [2020-09-17 14:59:35,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130808831] [2020-09-17 14:59:35,860 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:35,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:35,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:35,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:35,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [178143488] [2020-09-17 14:59:35,959 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:35,961 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:35,968 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:35,968 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:35,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:35,971 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:36,028 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:36,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:36,041 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 14:59:36,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:36,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:36,043 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-09-17 14:59:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:37,231 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-09-17 14:59:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:37,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:37,233 INFO L225 Difference]: With dead ends: 121 [2020-09-17 14:59:37,233 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 14:59:37,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 14:59:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 14:59:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 14:59:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 14:59:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-09-17 14:59:37,236 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-09-17 14:59:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:37,236 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-09-17 14:59:37,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-09-17 14:59:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:37,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:37,236 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:37,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 14:59:37,437 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-09-17 14:59:37,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:37,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276203161] [2020-09-17 14:59:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:37,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276203161] [2020-09-17 14:59:37,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505192168] [2020-09-17 14:59:37,891 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:37,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:37,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:37,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:37,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1938754709] [2020-09-17 14:59:37,992 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:37,993 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:38,000 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:38,000 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:38,001 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:38,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:38,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:38,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:38,072 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 14:59:38,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:38,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:38,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:38,073 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-09-17 14:59:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:39,440 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-09-17 14:59:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 14:59:39,441 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:39,442 INFO L225 Difference]: With dead ends: 119 [2020-09-17 14:59:39,442 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 14:59:39,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 14:59:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 14:59:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 14:59:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 14:59:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-09-17 14:59:39,445 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-09-17 14:59:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:39,446 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-09-17 14:59:39,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-09-17 14:59:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:39,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:39,447 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:39,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:39,657 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-09-17 14:59:39,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:39,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284833765] [2020-09-17 14:59:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284833765] [2020-09-17 14:59:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316579753] [2020-09-17 14:59:40,127 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:40,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:40,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:40,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:40,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [746378315] [2020-09-17 14:59:40,219 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:40,220 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:40,227 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:40,227 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:40,228 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:40,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:40,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:40,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:40,301 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 14:59:40,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:40,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:40,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:40,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:40,302 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-09-17 14:59:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:41,716 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-17 14:59:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 14:59:41,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:41,717 INFO L225 Difference]: With dead ends: 117 [2020-09-17 14:59:41,717 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 14:59:41,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 14:59:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 14:59:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-09-17 14:59:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 14:59:41,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-09-17 14:59:41,721 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-09-17 14:59:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:41,722 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-09-17 14:59:41,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-09-17 14:59:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:41,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:41,723 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:41,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 14:59:41,932 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-09-17 14:59:41,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:41,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495146635] [2020-09-17 14:59:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:42,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495146635] [2020-09-17 14:59:42,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959682566] [2020-09-17 14:59:42,379 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:42,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 14:59:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:42,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:42,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:42,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1378436700] [2020-09-17 14:59:42,487 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:42,488 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:42,495 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:42,495 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:42,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:42,497 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:42,552 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:42,553 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:42,577 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 14:59:42,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:42,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:42,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:42,578 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-09-17 14:59:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:44,184 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-09-17 14:59:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 14:59:44,185 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:44,186 INFO L225 Difference]: With dead ends: 115 [2020-09-17 14:59:44,186 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 14:59:44,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 14:59:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 14:59:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-09-17 14:59:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 14:59:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-09-17 14:59:44,189 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-09-17 14:59:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:44,190 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-09-17 14:59:44,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-09-17 14:59:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:44,190 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-17 14:59:44,391 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:44,392 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-09-17 14:59:44,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:44,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664647866] [2020-09-17 14:59:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:44,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664647866] [2020-09-17 14:59:44,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851171403] [2020-09-17 14:59:44,769 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:44,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:59:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:44,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:44,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:44,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:44,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2018504655] [2020-09-17 14:59:44,865 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:44,867 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:44,874 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:44,874 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:44,876 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:44,877 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:44,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:44,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:44,944 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 14:59:44,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:44,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:44,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:44,945 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-09-17 14:59:46,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:46,688 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-09-17 14:59:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 14:59:46,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:46,690 INFO L225 Difference]: With dead ends: 113 [2020-09-17 14:59:46,690 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 14:59:46,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 14:59:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 14:59:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-09-17 14:59:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 14:59:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-09-17 14:59:46,693 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-09-17 14:59:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:46,693 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-09-17 14:59:46,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-09-17 14:59:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:46,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:46,694 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:46,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 14:59:46,895 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-09-17 14:59:46,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:46,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985695047] [2020-09-17 14:59:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:47,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985695047] [2020-09-17 14:59:47,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594092988] [2020-09-17 14:59:47,320 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:47,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 14:59:47,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:47,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:47,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:47,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:47,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:47,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [255348405] [2020-09-17 14:59:47,431 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:47,432 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:47,438 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:47,439 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:47,439 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:47,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:47,495 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:47,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:47,510 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 14:59:47,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:47,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:47,512 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-09-17 14:59:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:49,367 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-09-17 14:59:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 14:59:49,368 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:49,369 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:49,369 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:59:49,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 14:59:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:59:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-17 14:59:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 14:59:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-09-17 14:59:49,373 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-09-17 14:59:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:49,373 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-09-17 14:59:49,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-09-17 14:59:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:49,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:49,374 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:49,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:49,581 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-09-17 14:59:49,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:49,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38331821] [2020-09-17 14:59:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:50,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38331821] [2020-09-17 14:59:50,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679013121] [2020-09-17 14:59:50,038 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:50,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 14:59:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:50,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:50,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:50,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:50,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675889068] [2020-09-17 14:59:50,158 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:50,160 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:50,170 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:50,170 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:50,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:50,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:50,234 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:50,234 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:50,256 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 14:59:50,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:50,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:50,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:50,257 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-09-17 14:59:52,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:52,216 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-09-17 14:59:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 14:59:52,217 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:52,218 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:52,218 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 14:59:52,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 14:59:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 14:59:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-09-17 14:59:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 14:59:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-09-17 14:59:52,221 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-09-17 14:59:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:52,221 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-09-17 14:59:52,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-09-17 14:59:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:59:52,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:52,222 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:52,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:52,423 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-09-17 14:59:52,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:52,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718327035] [2020-09-17 14:59:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:52,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718327035] [2020-09-17 14:59:52,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539814797] [2020-09-17 14:59:52,860 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 14:59:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:52,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:52,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 14:59:52,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [251996992] [2020-09-17 14:59:52,960 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:52,962 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:52,969 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-17 14:59:52,969 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:52,970 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:52,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:53,030 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:53,030 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:53,052 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 14:59:53,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:59:53,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:53,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:59:53,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:59:53,053 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-09-17 14:59:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:55,083 INFO L93 Difference]: Finished difference Result 111 states and 283 transitions. [2020-09-17 14:59:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 14:59:55,084 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 14:59:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:55,085 INFO L225 Difference]: With dead ends: 111 [2020-09-17 14:59:55,085 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 14:59:55,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1332, Invalid=2958, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 14:59:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 14:59:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-17 14:59:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:59:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 14:59:55,088 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2020-09-17 14:59:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:55,088 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 14:59:55,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:59:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 14:59:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:55,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:55,089 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:55,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:55,298 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:55,298 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 110 times [2020-09-17 14:59:55,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:55,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694680995] [2020-09-17 14:59:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:55,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694680995] [2020-09-17 14:59:55,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751436856] [2020-09-17 14:59:55,888 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:55,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:59:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:55,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:55,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:55,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1651751626] [2020-09-17 14:59:55,971 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:55,972 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:55,980 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-09-17 14:59:55,980 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:55,983 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:55,983 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,029 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,030 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,077 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,077 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,090 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,094 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,150 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:56,150 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:56,159 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39943#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 14:59:56,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:56,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:56,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:56,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:56,160 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 26 states. [2020-09-17 14:59:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:57,290 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2020-09-17 14:59:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 14:59:57,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:57,292 INFO L225 Difference]: With dead ends: 108 [2020-09-17 14:59:57,292 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 14:59:57,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=688, Invalid=1664, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 14:59:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 14:59:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-17 14:59:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 14:59:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 14:59:57,295 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 29 [2020-09-17 14:59:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:57,295 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 14:59:57,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 14:59:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:57,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:57,296 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:57,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 14:59:57,497 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 111 times [2020-09-17 14:59:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:57,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132790502] [2020-09-17 14:59:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:59:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:58,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132790502] [2020-09-17 14:59:58,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824924749] [2020-09-17 14:59:58,059 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:59:58,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 14:59:58,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:59:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 14:59:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:59:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:59:58,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:59:58,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 14:59:58,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2048873567] [2020-09-17 14:59:58,146 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:59:58,148 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:59:58,153 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 14:59:58,153 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:59:58,155 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:58,156 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:58,210 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:59:58,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:59:58,219 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40363#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 14:59:58,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 14:59:58,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:59:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 14:59:58,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:59:58,221 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 26 states. [2020-09-17 14:59:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:59:59,473 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2020-09-17 14:59:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:59:59,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 14:59:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:59:59,475 INFO L225 Difference]: With dead ends: 152 [2020-09-17 14:59:59,475 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 14:59:59,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=749, Invalid=2007, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 14:59:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 14:59:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2020-09-17 14:59:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 14:59:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2020-09-17 14:59:59,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 29 [2020-09-17 14:59:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:59:59,479 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2020-09-17 14:59:59,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 14:59:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2020-09-17 14:59:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 14:59:59,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:59:59,479 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:59:59,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-17 14:59:59,680 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:59:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:59:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 112 times [2020-09-17 14:59:59,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:59:59,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278760893] [2020-09-17 14:59:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:59:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:00,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278760893] [2020-09-17 15:00:00,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875240460] [2020-09-17 15:00:00,253 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:00,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:00,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:00,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:00,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:00,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1559574629] [2020-09-17 15:00:00,349 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:00,352 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:00,361 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:00,361 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:00,368 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:00,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:00,434 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:00,434 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:00,449 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40839#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:00:00,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:00,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:00,451 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand 26 states. [2020-09-17 15:00:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:01,852 INFO L93 Difference]: Finished difference Result 149 states and 338 transitions. [2020-09-17 15:00:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:00:01,853 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:01,854 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:00:01,854 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:00:01,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=776, Invalid=2194, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 15:00:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:00:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 82. [2020-09-17 15:00:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:00:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 204 transitions. [2020-09-17 15:00:01,857 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 204 transitions. Word has length 29 [2020-09-17 15:00:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:01,858 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 204 transitions. [2020-09-17 15:00:01,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 204 transitions. [2020-09-17 15:00:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:01,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:01,859 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:02,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 15:00:02,060 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:02,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 113 times [2020-09-17 15:00:02,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:02,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569850540] [2020-09-17 15:00:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:02,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569850540] [2020-09-17 15:00:02,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255174874] [2020-09-17 15:00:02,610 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:02,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:02,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:02,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:02,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1358891018] [2020-09-17 15:00:02,713 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:02,715 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:02,723 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:02,723 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:02,727 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:02,727 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:02,799 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:02,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:02,813 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41320#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:00:02,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:02,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:02,815 INFO L87 Difference]: Start difference. First operand 82 states and 204 transitions. Second operand 26 states. [2020-09-17 15:00:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:04,291 INFO L93 Difference]: Finished difference Result 147 states and 336 transitions. [2020-09-17 15:00:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:00:04,292 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:04,293 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:00:04,293 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:00:04,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 15:00:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:00:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2020-09-17 15:00:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 15:00:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 210 transitions. [2020-09-17 15:00:04,297 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 210 transitions. Word has length 29 [2020-09-17 15:00:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:04,297 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 210 transitions. [2020-09-17 15:00:04,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 210 transitions. [2020-09-17 15:00:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:04,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:04,298 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:04,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 15:00:04,506 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 114 times [2020-09-17 15:00:04,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:04,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875649190] [2020-09-17 15:00:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:05,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875649190] [2020-09-17 15:00:05,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838748876] [2020-09-17 15:00:05,070 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:05,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 15:00:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:05,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:05,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:05,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [698389354] [2020-09-17 15:00:05,180 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:05,182 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:05,189 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:05,189 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:05,192 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:05,193 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:05,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:05,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:05,271 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:00:05,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:05,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:05,272 INFO L87 Difference]: Start difference. First operand 84 states and 210 transitions. Second operand 26 states. [2020-09-17 15:00:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:07,029 INFO L93 Difference]: Finished difference Result 145 states and 334 transitions. [2020-09-17 15:00:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:00:07,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:07,032 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:00:07,032 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:00:07,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 15:00:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:00:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-09-17 15:00:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:00:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 216 transitions. [2020-09-17 15:00:07,036 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 216 transitions. Word has length 29 [2020-09-17 15:00:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:07,036 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 216 transitions. [2020-09-17 15:00:07,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 216 transitions. [2020-09-17 15:00:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:07,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:07,037 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:07,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 15:00:07,245 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:07,246 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 115 times [2020-09-17 15:00:07,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:07,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281751365] [2020-09-17 15:00:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:07,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281751365] [2020-09-17 15:00:07,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624282924] [2020-09-17 15:00:07,761 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:07,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:07,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:07,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [626446760] [2020-09-17 15:00:07,855 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:07,857 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:07,867 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:07,867 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:07,878 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:07,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:07,938 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:07,938 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:07,950 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42300#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:00:07,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:07,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:07,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:07,952 INFO L87 Difference]: Start difference. First operand 86 states and 216 transitions. Second operand 26 states. [2020-09-17 15:00:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:09,647 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-17 15:00:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:00:09,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:09,649 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:00:09,649 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:00:09,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:00:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:00:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-09-17 15:00:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:00:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 222 transitions. [2020-09-17 15:00:09,652 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 222 transitions. Word has length 29 [2020-09-17 15:00:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:09,653 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 222 transitions. [2020-09-17 15:00:09,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 222 transitions. [2020-09-17 15:00:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:09,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:09,654 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:09,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:09,860 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 116 times [2020-09-17 15:00:09,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:09,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119387687] [2020-09-17 15:00:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:10,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119387687] [2020-09-17 15:00:10,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748823858] [2020-09-17 15:00:10,375 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:10,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:10,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:10,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:10,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1930847598] [2020-09-17 15:00:10,466 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:10,468 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:10,478 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:10,478 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:10,482 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:10,482 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:10,538 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:10,539 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:10,550 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42799#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:00:10,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:10,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:10,552 INFO L87 Difference]: Start difference. First operand 88 states and 222 transitions. Second operand 26 states. [2020-09-17 15:00:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:12,362 INFO L93 Difference]: Finished difference Result 141 states and 330 transitions. [2020-09-17 15:00:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:00:12,363 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:12,364 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:00:12,364 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:00:12,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1044, Invalid=2862, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:00:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:00:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2020-09-17 15:00:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:00:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2020-09-17 15:00:12,367 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 29 [2020-09-17 15:00:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:12,367 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2020-09-17 15:00:12,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2020-09-17 15:00:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:12,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:12,368 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:12,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 15:00:12,571 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 117 times [2020-09-17 15:00:12,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:12,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957653850] [2020-09-17 15:00:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957653850] [2020-09-17 15:00:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005722528] [2020-09-17 15:00:13,053 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:13,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:13,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:13,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:13,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:13,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [439981913] [2020-09-17 15:00:13,162 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:13,163 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:13,170 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:13,171 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:13,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:13,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:13,229 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:13,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:13,241 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43304#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:00:13,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:13,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:13,243 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand 26 states. [2020-09-17 15:00:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:15,170 INFO L93 Difference]: Finished difference Result 139 states and 328 transitions. [2020-09-17 15:00:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:00:15,171 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:15,172 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:00:15,172 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:00:15,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1151, Invalid=3009, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:00:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:00:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-09-17 15:00:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:00:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 234 transitions. [2020-09-17 15:00:15,176 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 234 transitions. Word has length 29 [2020-09-17 15:00:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:15,176 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 234 transitions. [2020-09-17 15:00:15,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 234 transitions. [2020-09-17 15:00:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:15,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:15,176 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:15,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:15,378 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 118 times [2020-09-17 15:00:15,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:15,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497129120] [2020-09-17 15:00:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:15,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497129120] [2020-09-17 15:00:15,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027465847] [2020-09-17 15:00:15,843 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:15,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:15,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:15,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:15,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [613078360] [2020-09-17 15:00:15,944 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:15,946 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:15,953 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:15,953 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:15,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:15,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:16,013 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:16,014 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:16,026 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43815#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:00:16,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:16,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:16,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:16,027 INFO L87 Difference]: Start difference. First operand 92 states and 234 transitions. Second operand 26 states. [2020-09-17 15:00:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:18,063 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2020-09-17 15:00:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:00:18,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:18,065 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:00:18,065 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:00:18,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1274, Invalid=3148, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:00:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:00:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-09-17 15:00:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:00:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 240 transitions. [2020-09-17 15:00:18,068 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 240 transitions. Word has length 29 [2020-09-17 15:00:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:18,069 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 240 transitions. [2020-09-17 15:00:18,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 240 transitions. [2020-09-17 15:00:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:18,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:18,069 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:18,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:18,270 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 119 times [2020-09-17 15:00:18,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:18,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614780076] [2020-09-17 15:00:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:18,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614780076] [2020-09-17 15:00:18,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86899531] [2020-09-17 15:00:18,776 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:18,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:18,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:18,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:18,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1287242787] [2020-09-17 15:00:18,888 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:18,890 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:18,898 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:18,898 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:18,901 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:18,901 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:18,961 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:18,961 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:18,973 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:00:18,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:18,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:18,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:18,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:18,975 INFO L87 Difference]: Start difference. First operand 94 states and 240 transitions. Second operand 26 states. [2020-09-17 15:00:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:21,148 INFO L93 Difference]: Finished difference Result 137 states and 329 transitions. [2020-09-17 15:00:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:00:21,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:21,151 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:00:21,151 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:00:21,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1413, Invalid=3279, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:00:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:00:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-09-17 15:00:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:00:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 248 transitions. [2020-09-17 15:00:21,154 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 248 transitions. Word has length 29 [2020-09-17 15:00:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:21,154 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 248 transitions. [2020-09-17 15:00:21,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 248 transitions. [2020-09-17 15:00:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 15:00:21,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:21,155 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:21,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2020-09-17 15:00:21,356 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 120 times [2020-09-17 15:00:21,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:21,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914730312] [2020-09-17 15:00:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:21,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914730312] [2020-09-17 15:00:21,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142945579] [2020-09-17 15:00:21,829 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:21,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 15:00:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 15:00:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:21,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:21,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 15:00:21,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [267023311] [2020-09-17 15:00:21,943 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:21,946 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:21,955 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-17 15:00:21,956 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:21,966 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:21,966 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:22,022 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:22,023 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:22,035 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44857#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:00:22,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 15:00:22,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 15:00:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-09-17 15:00:22,036 INFO L87 Difference]: Start difference. First operand 96 states and 248 transitions. Second operand 26 states. [2020-09-17 15:00:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:24,294 INFO L93 Difference]: Finished difference Result 138 states and 339 transitions. [2020-09-17 15:00:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 15:00:24,296 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 15:00:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:24,296 INFO L225 Difference]: With dead ends: 138 [2020-09-17 15:00:24,297 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 15:00:24,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1566, Invalid=3404, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:00:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 15:00:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2020-09-17 15:00:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 15:00:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 15:00:24,299 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2020-09-17 15:00:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:24,299 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 15:00:24,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 15:00:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 15:00:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:24,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:24,300 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:24,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:24,501 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 121 times [2020-09-17 15:00:24,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:24,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566143985] [2020-09-17 15:00:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:25,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566143985] [2020-09-17 15:00:25,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918771450] [2020-09-17 15:00:25,182 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:25,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:25,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:25,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:25,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:25,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [291615791] [2020-09-17 15:00:25,271 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:25,272 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:25,280 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-17 15:00:25,280 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:25,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:25,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:25,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:25,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:25,366 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:00:25,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:25,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:25,367 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 27 states. [2020-09-17 15:00:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:26,526 INFO L93 Difference]: Finished difference Result 134 states and 306 transitions. [2020-09-17 15:00:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 15:00:26,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:26,528 INFO L225 Difference]: With dead ends: 134 [2020-09-17 15:00:26,528 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 15:00:26,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 15:00:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 15:00:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2020-09-17 15:00:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 15:00:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 200 transitions. [2020-09-17 15:00:26,531 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 200 transitions. Word has length 30 [2020-09-17 15:00:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:26,531 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 200 transitions. [2020-09-17 15:00:26,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 200 transitions. [2020-09-17 15:00:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:26,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:26,532 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:26,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:26,742 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 122 times [2020-09-17 15:00:26,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:26,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038018180] [2020-09-17 15:00:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:27,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038018180] [2020-09-17 15:00:27,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700317050] [2020-09-17 15:00:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:27,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:27,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:27,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:27,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:27,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [482098255] [2020-09-17 15:00:27,476 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:27,477 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:27,485 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:27,485 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:27,487 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:27,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:27,548 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:27,548 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:27,562 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45807#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:00:27,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:27,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:27,563 INFO L87 Difference]: Start difference. First operand 81 states and 200 transitions. Second operand 27 states. [2020-09-17 15:00:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:28,858 INFO L93 Difference]: Finished difference Result 131 states and 302 transitions. [2020-09-17 15:00:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:00:28,859 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:28,860 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:00:28,860 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:00:28,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 15:00:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:00:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-09-17 15:00:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 15:00:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2020-09-17 15:00:28,864 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 30 [2020-09-17 15:00:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:28,864 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2020-09-17 15:00:28,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2020-09-17 15:00:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:28,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:28,864 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:29,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 15:00:29,066 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:29,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:29,066 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 123 times [2020-09-17 15:00:29,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:29,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089886072] [2020-09-17 15:00:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:29,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089886072] [2020-09-17 15:00:29,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080989007] [2020-09-17 15:00:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:29,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:29,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:29,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:29,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [79971742] [2020-09-17 15:00:29,805 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:29,807 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:29,814 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:29,814 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:29,815 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:29,815 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:29,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:29,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:29,903 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46272#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:00:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:29,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:29,904 INFO L87 Difference]: Start difference. First operand 83 states and 206 transitions. Second operand 27 states. [2020-09-17 15:00:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:31,333 INFO L93 Difference]: Finished difference Result 129 states and 300 transitions. [2020-09-17 15:00:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:00:31,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:31,335 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:00:31,336 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:00:31,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 15:00:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:00:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-09-17 15:00:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 15:00:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 212 transitions. [2020-09-17 15:00:31,338 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 212 transitions. Word has length 30 [2020-09-17 15:00:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:31,338 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 212 transitions. [2020-09-17 15:00:31,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:31,338 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 212 transitions. [2020-09-17 15:00:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:31,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:31,339 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:31,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:31,540 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 124 times [2020-09-17 15:00:31,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:31,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025764893] [2020-09-17 15:00:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:32,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025764893] [2020-09-17 15:00:32,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537940476] [2020-09-17 15:00:32,130 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:32,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:32,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:32,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:32,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:32,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843869014] [2020-09-17 15:00:32,224 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:32,225 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:32,233 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:32,233 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:32,234 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:32,234 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:32,298 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:32,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:32,312 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46743#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:00:32,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:32,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:32,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:32,313 INFO L87 Difference]: Start difference. First operand 85 states and 212 transitions. Second operand 27 states. [2020-09-17 15:00:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:33,903 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-17 15:00:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:00:33,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:33,905 INFO L225 Difference]: With dead ends: 127 [2020-09-17 15:00:33,905 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 15:00:33,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 15:00:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 15:00:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-09-17 15:00:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 15:00:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 218 transitions. [2020-09-17 15:00:33,909 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 218 transitions. Word has length 30 [2020-09-17 15:00:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:33,909 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 218 transitions. [2020-09-17 15:00:33,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 218 transitions. [2020-09-17 15:00:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:33,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:33,910 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:34,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 15:00:34,118 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 125 times [2020-09-17 15:00:34,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:34,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966610959] [2020-09-17 15:00:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:34,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966610959] [2020-09-17 15:00:34,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281054980] [2020-09-17 15:00:34,666 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:34,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:34,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:34,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:34,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:34,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1816345676] [2020-09-17 15:00:34,768 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:34,769 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:34,789 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:34,790 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:34,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:34,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:34,849 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:34,850 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:34,863 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47220#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:00:34,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:34,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:34,865 INFO L87 Difference]: Start difference. First operand 87 states and 218 transitions. Second operand 27 states. [2020-09-17 15:00:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:36,588 INFO L93 Difference]: Finished difference Result 125 states and 296 transitions. [2020-09-17 15:00:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:00:36,589 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:36,590 INFO L225 Difference]: With dead ends: 125 [2020-09-17 15:00:36,590 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 15:00:36,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=891, Invalid=2649, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:00:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 15:00:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-09-17 15:00:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:00:36,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2020-09-17 15:00:36,593 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 30 [2020-09-17 15:00:36,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:36,593 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2020-09-17 15:00:36,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2020-09-17 15:00:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:36,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:36,594 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:36,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:36,797 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 126 times [2020-09-17 15:00:36,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:36,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429739550] [2020-09-17 15:00:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:37,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429739550] [2020-09-17 15:00:37,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583744459] [2020-09-17 15:00:37,329 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:37,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 15:00:37,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:37,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:37,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:37,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [209152308] [2020-09-17 15:00:37,438 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:37,440 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:37,448 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:37,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:37,450 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:37,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:37,522 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:37,523 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:37,542 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47703#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:00:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:37,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:37,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:37,543 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand 27 states. [2020-09-17 15:00:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:39,445 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2020-09-17 15:00:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:00:39,446 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:39,448 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:00:39,449 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:00:39,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=967, Invalid=2815, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:00:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:00:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 15:00:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:00:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2020-09-17 15:00:39,453 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 30 [2020-09-17 15:00:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:39,453 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2020-09-17 15:00:39,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2020-09-17 15:00:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:39,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:39,454 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:39,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 15:00:39,665 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 127 times [2020-09-17 15:00:39,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:39,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121635082] [2020-09-17 15:00:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:40,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121635082] [2020-09-17 15:00:40,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354597290] [2020-09-17 15:00:40,212 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:40,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:40,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:40,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2007057460] [2020-09-17 15:00:40,319 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:40,322 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:40,353 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:40,353 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:40,356 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:40,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:40,428 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:40,428 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:40,443 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48192#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:00:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:40,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:40,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:40,446 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand 27 states. [2020-09-17 15:00:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:42,440 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2020-09-17 15:00:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:00:42,442 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:42,442 INFO L225 Difference]: With dead ends: 121 [2020-09-17 15:00:42,442 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 15:00:42,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:00:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 15:00:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-09-17 15:00:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:00:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 236 transitions. [2020-09-17 15:00:42,446 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 236 transitions. Word has length 30 [2020-09-17 15:00:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:42,446 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 236 transitions. [2020-09-17 15:00:42,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 236 transitions. [2020-09-17 15:00:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:42,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:42,447 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:42,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:42,651 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 128 times [2020-09-17 15:00:42,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:42,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420493890] [2020-09-17 15:00:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420493890] [2020-09-17 15:00:43,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844621338] [2020-09-17 15:00:43,186 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:43,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:00:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:43,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:43,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:43,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:43,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1628687732] [2020-09-17 15:00:43,289 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:43,291 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:43,298 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:43,299 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:43,301 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:43,301 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:43,362 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:43,363 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:43,377 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48687#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:00:43,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:43,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:43,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:43,378 INFO L87 Difference]: Start difference. First operand 93 states and 236 transitions. Second operand 27 states. [2020-09-17 15:00:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:45,510 INFO L93 Difference]: Finished difference Result 119 states and 290 transitions. [2020-09-17 15:00:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:00:45,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:45,512 INFO L225 Difference]: With dead ends: 119 [2020-09-17 15:00:45,512 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 15:00:45,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1167, Invalid=3123, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:00:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 15:00:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-09-17 15:00:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:00:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 242 transitions. [2020-09-17 15:00:45,515 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 242 transitions. Word has length 30 [2020-09-17 15:00:45,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:45,516 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 242 transitions. [2020-09-17 15:00:45,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 242 transitions. [2020-09-17 15:00:45,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:45,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:45,516 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:45,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 15:00:45,718 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 129 times [2020-09-17 15:00:45,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:45,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041642095] [2020-09-17 15:00:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:46,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041642095] [2020-09-17 15:00:46,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846327043] [2020-09-17 15:00:46,204 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:46,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 15:00:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:46,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:46,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:46,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1549637435] [2020-09-17 15:00:46,318 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:46,320 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:46,327 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:46,327 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:46,327 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:46,328 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:46,394 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:46,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:46,415 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49188#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:00:46,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:46,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:46,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:46,417 INFO L87 Difference]: Start difference. First operand 95 states and 242 transitions. Second operand 27 states. [2020-09-17 15:00:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:48,752 INFO L93 Difference]: Finished difference Result 117 states and 288 transitions. [2020-09-17 15:00:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:00:48,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:48,755 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:48,755 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:00:48,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1291, Invalid=3265, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:00:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:00:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-09-17 15:00:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:00:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 248 transitions. [2020-09-17 15:00:48,758 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 248 transitions. Word has length 30 [2020-09-17 15:00:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:48,758 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 248 transitions. [2020-09-17 15:00:48,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 248 transitions. [2020-09-17 15:00:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:48,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:48,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:48,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:48,960 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 130 times [2020-09-17 15:00:48,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:48,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065650298] [2020-09-17 15:00:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:49,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065650298] [2020-09-17 15:00:49,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620266945] [2020-09-17 15:00:49,489 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:49,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:00:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:49,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:49,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:49,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [755849026] [2020-09-17 15:00:49,595 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:49,596 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:49,604 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:49,604 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:49,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:49,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:49,663 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:49,663 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:49,677 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49695#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:00:49,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:49,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:49,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:49,679 INFO L87 Difference]: Start difference. First operand 97 states and 248 transitions. Second operand 27 states. [2020-09-17 15:00:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:52,092 INFO L93 Difference]: Finished difference Result 117 states and 291 transitions. [2020-09-17 15:00:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:00:52,093 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:52,094 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:52,094 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:00:52,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1431, Invalid=3399, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:00:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:00:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-09-17 15:00:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:00:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 256 transitions. [2020-09-17 15:00:52,097 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 256 transitions. Word has length 30 [2020-09-17 15:00:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:52,097 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 256 transitions. [2020-09-17 15:00:52,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 256 transitions. [2020-09-17 15:00:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 15:00:52,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:52,098 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:52,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:52,299 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:52,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 131 times [2020-09-17 15:00:52,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:52,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95673698] [2020-09-17 15:00:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:52,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95673698] [2020-09-17 15:00:52,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592401937] [2020-09-17 15:00:52,858 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:52,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 15:00:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 15:00:52,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:52,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:52,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 15:00:52,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1296656715] [2020-09-17 15:00:52,976 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:52,977 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:52,985 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-17 15:00:52,985 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:52,986 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:52,986 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:53,049 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:53,050 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:53,067 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50210#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:00:53,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 15:00:53,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:53,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 15:00:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-17 15:00:53,068 INFO L87 Difference]: Start difference. First operand 99 states and 256 transitions. Second operand 27 states. [2020-09-17 15:00:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:55,626 INFO L93 Difference]: Finished difference Result 117 states and 299 transitions. [2020-09-17 15:00:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 15:00:55,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 15:00:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:55,628 INFO L225 Difference]: With dead ends: 117 [2020-09-17 15:00:55,628 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 15:00:55,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1585, Invalid=3527, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:00:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 15:00:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 15:00:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 15:00:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 15:00:55,631 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2020-09-17 15:00:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:55,632 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 15:00:55,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 15:00:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 15:00:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:55,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:55,632 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:55,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:55,833 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 132 times [2020-09-17 15:00:55,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:55,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202361094] [2020-09-17 15:00:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:56,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202361094] [2020-09-17 15:00:56,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494584100] [2020-09-17 15:00:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:56,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:00:56,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:00:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:56,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:56,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:56,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2055291809] [2020-09-17 15:00:56,632 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:56,634 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:56,643 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2020-09-17 15:00:56,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:56,648 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,703 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,703 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,743 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,777 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,815 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,815 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,824 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:56,824 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:56,834 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50683#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 15:00:56,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:56,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:56,835 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 28 states. [2020-09-17 15:00:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:00:58,192 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2020-09-17 15:00:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:00:58,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:00:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:00:58,194 INFO L225 Difference]: With dead ends: 114 [2020-09-17 15:00:58,194 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 15:00:58,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 15:00:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 15:00:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-17 15:00:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:00:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-17 15:00:58,196 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 31 [2020-09-17 15:00:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:00:58,197 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-17 15:00:58,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:00:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-17 15:00:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:00:58,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:00:58,197 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:00:58,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 15:00:58,398 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:00:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:00:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 133 times [2020-09-17 15:00:58,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:00:58,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924018530] [2020-09-17 15:00:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:00:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:59,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924018530] [2020-09-17 15:00:59,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106672668] [2020-09-17 15:00:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:00:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:00:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:00:59,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:00:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:00:59,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:00:59,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:00:59,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [177403584] [2020-09-17 15:00:59,232 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:00:59,234 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:00:59,242 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:00:59,242 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:00:59,243 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:59,243 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:59,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:00:59,310 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:00:59,325 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51129#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 15:00:59,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:00:59,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:00:59,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:00:59,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:00:59,327 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 28 states. [2020-09-17 15:01:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:00,886 INFO L93 Difference]: Finished difference Result 162 states and 364 transitions. [2020-09-17 15:01:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:01:00,888 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:00,889 INFO L225 Difference]: With dead ends: 162 [2020-09-17 15:01:00,889 INFO L226 Difference]: Without dead ends: 156 [2020-09-17 15:01:00,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=872, Invalid=2320, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 15:01:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-17 15:01:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 84. [2020-09-17 15:01:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 15:01:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-09-17 15:01:00,892 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 31 [2020-09-17 15:01:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:00,892 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-09-17 15:01:00,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-09-17 15:01:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:00,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:00,893 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:01,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-17 15:01:01,094 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:01,095 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 134 times [2020-09-17 15:01:01,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:01,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075996525] [2020-09-17 15:01:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:01,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075996525] [2020-09-17 15:01:01,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986884105] [2020-09-17 15:01:01,826 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:01,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:01,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:01,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:01,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:01,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:01,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304554890] [2020-09-17 15:01:01,917 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:01,919 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:01,926 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:01,926 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:01,928 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:01,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:01,980 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:01,980 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:01,991 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:01:01,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:01,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:01,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:01,992 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand 28 states. [2020-09-17 15:01:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:03,738 INFO L93 Difference]: Finished difference Result 159 states and 360 transitions. [2020-09-17 15:01:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:01:03,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:03,740 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:01:03,740 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:01:03,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=897, Invalid=2525, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 15:01:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:01:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2020-09-17 15:01:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:01:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 214 transitions. [2020-09-17 15:01:03,744 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 214 transitions. Word has length 31 [2020-09-17 15:01:03,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:03,744 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 214 transitions. [2020-09-17 15:01:03,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 214 transitions. [2020-09-17 15:01:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:03,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:03,744 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:03,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 15:01:03,946 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 135 times [2020-09-17 15:01:03,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:03,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853801323] [2020-09-17 15:01:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:04,586 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:04,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853801323] [2020-09-17 15:01:04,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532425268] [2020-09-17 15:01:04,587 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:04,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:04,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:04,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:04,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:04,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:04,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1284596778] [2020-09-17 15:01:04,698 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:04,701 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:04,708 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:04,709 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:04,711 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:04,712 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:04,775 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:04,775 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:04,789 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52146#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:01:04,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:04,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:04,791 INFO L87 Difference]: Start difference. First operand 86 states and 214 transitions. Second operand 28 states. [2020-09-17 15:01:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:06,538 INFO L93 Difference]: Finished difference Result 157 states and 358 transitions. [2020-09-17 15:01:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:01:06,540 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:06,540 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:01:06,540 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:01:06,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=938, Invalid=2722, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:01:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:01:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2020-09-17 15:01:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:01:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 220 transitions. [2020-09-17 15:01:06,543 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 220 transitions. Word has length 31 [2020-09-17 15:01:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:06,543 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 220 transitions. [2020-09-17 15:01:06,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 220 transitions. [2020-09-17 15:01:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:06,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:06,544 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:06,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 15:01:06,747 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:06,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 136 times [2020-09-17 15:01:06,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:06,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627040836] [2020-09-17 15:01:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:07,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627040836] [2020-09-17 15:01:07,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734000037] [2020-09-17 15:01:07,395 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:07,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:07,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:07,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:07,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:07,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152977586] [2020-09-17 15:01:07,493 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:07,495 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:07,502 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:07,503 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:07,506 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:07,506 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:07,575 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:07,576 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:07,608 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52663#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:01:07,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:07,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:07,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:07,609 INFO L87 Difference]: Start difference. First operand 88 states and 220 transitions. Second operand 28 states. [2020-09-17 15:01:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:09,499 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-17 15:01:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:01:09,500 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:09,501 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:01:09,501 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:01:09,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=995, Invalid=2911, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:01:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:01:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2020-09-17 15:01:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:01:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 226 transitions. [2020-09-17 15:01:09,504 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 226 transitions. Word has length 31 [2020-09-17 15:01:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:09,504 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 226 transitions. [2020-09-17 15:01:09,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 226 transitions. [2020-09-17 15:01:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:09,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:09,504 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:09,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 15:01:09,706 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 137 times [2020-09-17 15:01:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:09,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167010445] [2020-09-17 15:01:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:10,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167010445] [2020-09-17 15:01:10,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573707139] [2020-09-17 15:01:10,356 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:10,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:10,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:10,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:10,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:10,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:10,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275074789] [2020-09-17 15:01:10,475 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:10,477 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:10,488 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:10,488 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:10,491 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:10,492 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:10,581 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:10,582 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:10,594 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53186#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:01:10,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:10,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:10,595 INFO L87 Difference]: Start difference. First operand 90 states and 226 transitions. Second operand 28 states. [2020-09-17 15:01:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:12,625 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-17 15:01:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:01:12,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:12,627 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:01:12,627 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:01:12,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1068, Invalid=3092, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:01:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:01:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2020-09-17 15:01:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:01:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 232 transitions. [2020-09-17 15:01:12,632 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 232 transitions. Word has length 31 [2020-09-17 15:01:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:12,632 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 232 transitions. [2020-09-17 15:01:12,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 232 transitions. [2020-09-17 15:01:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:12,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:12,633 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:12,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:12,834 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 138 times [2020-09-17 15:01:12,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:12,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910071248] [2020-09-17 15:01:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:13,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910071248] [2020-09-17 15:01:13,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060543149] [2020-09-17 15:01:13,450 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:13,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:01:13,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:13,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:13,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:13,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [771525970] [2020-09-17 15:01:13,572 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:13,576 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:13,587 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:13,587 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:13,594 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:13,594 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:13,696 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:13,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:13,709 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53715#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:01:13,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:13,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:13,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:13,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:13,710 INFO L87 Difference]: Start difference. First operand 92 states and 232 transitions. Second operand 28 states. [2020-09-17 15:01:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:15,866 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-17 15:01:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:01:15,867 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:15,868 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:01:15,869 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:01:15,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:01:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:01:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2020-09-17 15:01:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:01:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 238 transitions. [2020-09-17 15:01:15,871 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 238 transitions. Word has length 31 [2020-09-17 15:01:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:15,871 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 238 transitions. [2020-09-17 15:01:15,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 238 transitions. [2020-09-17 15:01:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:15,872 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:16,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 15:01:16,073 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 139 times [2020-09-17 15:01:16,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:16,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662104540] [2020-09-17 15:01:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:16,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662104540] [2020-09-17 15:01:16,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161528884] [2020-09-17 15:01:16,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:16,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:16,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:16,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [929596033] [2020-09-17 15:01:16,741 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:16,743 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:16,751 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:16,751 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:16,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:16,752 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:16,821 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:16,822 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:16,841 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54250#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:01:16,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:16,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:16,843 INFO L87 Difference]: Start difference. First operand 94 states and 238 transitions. Second operand 28 states. [2020-09-17 15:01:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:19,177 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 15:01:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:01:19,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:19,179 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:01:19,179 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:01:19,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1262, Invalid=3430, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:01:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:01:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-09-17 15:01:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:01:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 244 transitions. [2020-09-17 15:01:19,182 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 244 transitions. Word has length 31 [2020-09-17 15:01:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:19,182 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 244 transitions. [2020-09-17 15:01:19,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 244 transitions. [2020-09-17 15:01:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:19,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:19,183 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:19,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:19,384 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 140 times [2020-09-17 15:01:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:19,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142090081] [2020-09-17 15:01:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:19,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142090081] [2020-09-17 15:01:19,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023640011] [2020-09-17 15:01:19,966 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:20,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:20,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:20,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:20,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1745418014] [2020-09-17 15:01:20,074 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:20,076 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:20,084 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:20,085 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:20,087 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:20,087 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:20,151 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:20,151 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:20,163 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54791#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:01:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:20,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:20,165 INFO L87 Difference]: Start difference. First operand 96 states and 244 transitions. Second operand 28 states. [2020-09-17 15:01:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:22,600 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-17 15:01:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:01:22,600 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:22,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:22,601 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:01:22,601 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:01:22,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1383, Invalid=3587, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:01:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:01:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-17 15:01:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:01:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 250 transitions. [2020-09-17 15:01:22,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 250 transitions. Word has length 31 [2020-09-17 15:01:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:22,605 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 250 transitions. [2020-09-17 15:01:22,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 250 transitions. [2020-09-17 15:01:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:22,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:22,606 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:22,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:22,807 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 141 times [2020-09-17 15:01:22,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:22,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356588636] [2020-09-17 15:01:22,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356588636] [2020-09-17 15:01:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416437526] [2020-09-17 15:01:23,372 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:23,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:23,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:23,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:23,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:23,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1731749336] [2020-09-17 15:01:23,486 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:23,488 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:23,497 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:23,497 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:23,500 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:23,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:23,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:23,572 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:23,588 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55338#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:01:23,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:23,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:23,589 INFO L87 Difference]: Start difference. First operand 98 states and 250 transitions. Second operand 28 states. [2020-09-17 15:01:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:26,220 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 15:01:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:01:26,221 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:26,222 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:01:26,222 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:01:26,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1520, Invalid=3736, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:01:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:01:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2020-09-17 15:01:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:01:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 256 transitions. [2020-09-17 15:01:26,225 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 256 transitions. Word has length 31 [2020-09-17 15:01:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:26,225 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 256 transitions. [2020-09-17 15:01:26,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 256 transitions. [2020-09-17 15:01:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:26,226 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:26,226 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:26,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:26,427 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 142 times [2020-09-17 15:01:26,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:26,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30736959] [2020-09-17 15:01:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:27,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30736959] [2020-09-17 15:01:27,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776208078] [2020-09-17 15:01:27,026 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:27,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:27,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:27,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926945371] [2020-09-17 15:01:27,165 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:27,168 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:27,182 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:27,183 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:27,183 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:27,184 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:27,253 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:27,253 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:27,268 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55891#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:01:27,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:27,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:27,269 INFO L87 Difference]: Start difference. First operand 100 states and 256 transitions. Second operand 28 states. [2020-09-17 15:01:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:30,054 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-17 15:01:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:01:30,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:30,057 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:01:30,057 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:01:30,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1673, Invalid=3877, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:01:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:01:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2020-09-17 15:01:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:01:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 264 transitions. [2020-09-17 15:01:30,060 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 264 transitions. Word has length 31 [2020-09-17 15:01:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:30,061 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 264 transitions. [2020-09-17 15:01:30,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 264 transitions. [2020-09-17 15:01:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 15:01:30,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:30,061 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:30,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:30,262 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:30,263 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 143 times [2020-09-17 15:01:30,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:30,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5709617] [2020-09-17 15:01:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:30,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5709617] [2020-09-17 15:01:30,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933981453] [2020-09-17 15:01:30,834 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:30,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:30,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 15:01:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:30,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:30,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 15:01:30,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [531236634] [2020-09-17 15:01:30,958 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:30,959 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:30,967 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-17 15:01:30,968 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:30,971 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:30,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:31,043 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:31,043 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:31,059 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56452#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:01:31,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 15:01:31,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 15:01:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-09-17 15:01:31,060 INFO L87 Difference]: Start difference. First operand 102 states and 264 transitions. Second operand 28 states. [2020-09-17 15:01:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:34,027 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2020-09-17 15:01:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 15:01:34,029 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 15:01:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:34,030 INFO L225 Difference]: With dead ends: 146 [2020-09-17 15:01:34,030 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 15:01:34,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1840, Invalid=4012, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:01:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 15:01:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2020-09-17 15:01:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 15:01:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-17 15:01:34,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 31 [2020-09-17 15:01:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:34,033 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-17 15:01:34,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 15:01:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-17 15:01:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:34,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:34,034 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:34,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-17 15:01:34,235 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 144 times [2020-09-17 15:01:34,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:34,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885970862] [2020-09-17 15:01:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:35,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885970862] [2020-09-17 15:01:35,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867627598] [2020-09-17 15:01:35,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:35,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:01:35,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:35,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:35,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:35,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:35,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [86195422] [2020-09-17 15:01:35,215 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:35,217 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:35,227 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 48 transitions. [2020-09-17 15:01:35,227 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:35,230 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:35,230 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:35,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:35,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:35,327 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56974#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:01:35,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:35,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:35,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:35,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:35,329 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 29 states. [2020-09-17 15:01:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:36,834 INFO L93 Difference]: Finished difference Result 142 states and 324 transitions. [2020-09-17 15:01:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 15:01:36,836 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:36,837 INFO L225 Difference]: With dead ends: 142 [2020-09-17 15:01:36,837 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 15:01:36,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 15:01:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 15:01:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2020-09-17 15:01:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 15:01:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 210 transitions. [2020-09-17 15:01:36,840 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 210 transitions. Word has length 32 [2020-09-17 15:01:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:36,840 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 210 transitions. [2020-09-17 15:01:36,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:36,840 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 210 transitions. [2020-09-17 15:01:36,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:36,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:36,840 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:37,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 15:01:37,041 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 145 times [2020-09-17 15:01:37,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:37,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321410959] [2020-09-17 15:01:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:37,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321410959] [2020-09-17 15:01:37,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007398842] [2020-09-17 15:01:37,872 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:37,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:37,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:37,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356160094] [2020-09-17 15:01:37,991 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:37,994 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:38,008 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:38,008 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:38,009 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:38,009 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:38,082 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:38,082 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:38,101 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57462#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:01:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:38,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:38,102 INFO L87 Difference]: Start difference. First operand 85 states and 210 transitions. Second operand 29 states. [2020-09-17 15:01:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:39,762 INFO L93 Difference]: Finished difference Result 139 states and 320 transitions. [2020-09-17 15:01:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:01:39,764 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:39,765 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:01:39,765 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:01:39,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=882, Invalid=2424, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 15:01:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:01:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2020-09-17 15:01:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 15:01:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 216 transitions. [2020-09-17 15:01:39,768 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 216 transitions. Word has length 32 [2020-09-17 15:01:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:39,769 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 216 transitions. [2020-09-17 15:01:39,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 216 transitions. [2020-09-17 15:01:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:39,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:39,769 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:39,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 15:01:39,970 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:39,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 146 times [2020-09-17 15:01:39,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:39,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124904291] [2020-09-17 15:01:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124904291] [2020-09-17 15:01:40,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839755845] [2020-09-17 15:01:40,691 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:40,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:01:40,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:40,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:40,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:40,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:40,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2143174037] [2020-09-17 15:01:40,788 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:40,790 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:40,799 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:40,799 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:40,799 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:40,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:40,874 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:40,874 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:40,895 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57955#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:01:40,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:40,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:40,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:40,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:40,896 INFO L87 Difference]: Start difference. First operand 87 states and 216 transitions. Second operand 29 states. [2020-09-17 15:01:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:42,863 INFO L93 Difference]: Finished difference Result 137 states and 318 transitions. [2020-09-17 15:01:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:01:42,865 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:42,866 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:01:42,866 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:01:42,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=908, Invalid=2632, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:01:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:01:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-09-17 15:01:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:01:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 222 transitions. [2020-09-17 15:01:42,869 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 222 transitions. Word has length 32 [2020-09-17 15:01:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:42,870 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 222 transitions. [2020-09-17 15:01:42,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 222 transitions. [2020-09-17 15:01:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:42,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:42,870 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:43,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 15:01:43,071 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 147 times [2020-09-17 15:01:43,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:43,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371693928] [2020-09-17 15:01:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:43,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371693928] [2020-09-17 15:01:43,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561082195] [2020-09-17 15:01:43,854 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:43,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:01:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:43,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:43,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:43,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:43,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1051292554] [2020-09-17 15:01:43,973 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:43,975 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:43,983 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:43,983 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:43,985 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:43,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:44,061 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:44,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:44,084 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58454#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:01:44,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:44,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:44,086 INFO L87 Difference]: Start difference. First operand 89 states and 222 transitions. Second operand 29 states. [2020-09-17 15:01:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:46,089 INFO L93 Difference]: Finished difference Result 135 states and 316 transitions. [2020-09-17 15:01:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:01:46,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:46,091 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:01:46,092 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:01:46,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:01:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:01:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 91. [2020-09-17 15:01:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:01:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 228 transitions. [2020-09-17 15:01:46,094 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 228 transitions. Word has length 32 [2020-09-17 15:01:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 228 transitions. [2020-09-17 15:01:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 228 transitions. [2020-09-17 15:01:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:46,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:46,095 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:46,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 15:01:46,297 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 148 times [2020-09-17 15:01:46,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:46,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142573266] [2020-09-17 15:01:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:47,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142573266] [2020-09-17 15:01:47,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34045470] [2020-09-17 15:01:47,057 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:47,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:01:47,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:47,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:47,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:47,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:47,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1770985270] [2020-09-17 15:01:47,165 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:47,167 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:47,177 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:47,177 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:47,178 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:47,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:47,238 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:47,239 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:47,253 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58959#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:01:47,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:47,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:47,254 INFO L87 Difference]: Start difference. First operand 91 states and 228 transitions. Second operand 29 states. [2020-09-17 15:01:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:49,398 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-17 15:01:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:01:49,399 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:49,400 INFO L225 Difference]: With dead ends: 133 [2020-09-17 15:01:49,401 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 15:01:49,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1008, Invalid=3024, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:01:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 15:01:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2020-09-17 15:01:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:01:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 234 transitions. [2020-09-17 15:01:49,403 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 234 transitions. Word has length 32 [2020-09-17 15:01:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:49,404 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 234 transitions. [2020-09-17 15:01:49,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 234 transitions. [2020-09-17 15:01:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:49,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:49,404 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:49,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:49,605 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:49,606 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 149 times [2020-09-17 15:01:49,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:49,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544145860] [2020-09-17 15:01:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:50,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544145860] [2020-09-17 15:01:50,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075003000] [2020-09-17 15:01:50,267 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:50,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:01:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:50,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:50,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:50,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [740722537] [2020-09-17 15:01:50,386 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:50,387 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:50,397 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:50,397 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:50,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:50,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:50,466 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:50,466 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:50,486 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59470#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:01:50,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:50,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:50,487 INFO L87 Difference]: Start difference. First operand 93 states and 234 transitions. Second operand 29 states. [2020-09-17 15:01:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:53,120 INFO L93 Difference]: Finished difference Result 131 states and 312 transitions. [2020-09-17 15:01:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:01:53,122 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:53,123 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:01:53,123 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:01:53,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1082, Invalid=3208, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:01:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:01:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2020-09-17 15:01:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:01:53,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 240 transitions. [2020-09-17 15:01:53,126 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 240 transitions. Word has length 32 [2020-09-17 15:01:53,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:53,126 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 240 transitions. [2020-09-17 15:01:53,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 240 transitions. [2020-09-17 15:01:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:53,127 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:53,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:53,328 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 150 times [2020-09-17 15:01:53,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:53,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222769913] [2020-09-17 15:01:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:54,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222769913] [2020-09-17 15:01:54,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374420355] [2020-09-17 15:01:54,087 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:54,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 15:01:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:01:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:54,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:54,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:54,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1794038864] [2020-09-17 15:01:54,232 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:54,234 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:54,249 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:54,250 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:54,254 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:54,254 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:54,335 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:54,335 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:54,355 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59987#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:01:54,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:54,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:54,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:54,357 INFO L87 Difference]: Start difference. First operand 95 states and 240 transitions. Second operand 29 states. [2020-09-17 15:01:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:01:56,764 INFO L93 Difference]: Finished difference Result 129 states and 310 transitions. [2020-09-17 15:01:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:01:56,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:01:56,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:01:56,767 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:01:56,767 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:01:56,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1172, Invalid=3384, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:01:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:01:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-09-17 15:01:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:01:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 246 transitions. [2020-09-17 15:01:56,773 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 246 transitions. Word has length 32 [2020-09-17 15:01:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:01:56,773 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 246 transitions. [2020-09-17 15:01:56,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:01:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 246 transitions. [2020-09-17 15:01:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:01:56,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:01:56,774 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:01:56,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:56,983 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:01:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:01:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 151 times [2020-09-17 15:01:56,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:01:56,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117980132] [2020-09-17 15:01:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:01:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:57,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117980132] [2020-09-17 15:01:57,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313842219] [2020-09-17 15:01:57,622 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:01:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:01:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:01:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:01:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:01:57,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:01:57,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:01:57,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1882349119] [2020-09-17 15:01:57,731 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:01:57,733 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:01:57,742 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:01:57,742 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:01:57,744 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:57,745 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:57,830 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:01:57,830 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:01:57,847 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [60510#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:01:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:01:57,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:01:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:01:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:01:57,848 INFO L87 Difference]: Start difference. First operand 97 states and 246 transitions. Second operand 29 states. [2020-09-17 15:02:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:00,492 INFO L93 Difference]: Finished difference Result 127 states and 308 transitions. [2020-09-17 15:02:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:02:00,493 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:02:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:00,494 INFO L225 Difference]: With dead ends: 127 [2020-09-17 15:02:00,495 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 15:02:00,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1278, Invalid=3552, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:02:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 15:02:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-17 15:02:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:02:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2020-09-17 15:02:00,498 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 32 [2020-09-17 15:02:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:00,499 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2020-09-17 15:02:00,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:02:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2020-09-17 15:02:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:02:00,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:00,500 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:00,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:00,709 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:00,710 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 152 times [2020-09-17 15:02:00,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:00,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599721936] [2020-09-17 15:02:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:01,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599721936] [2020-09-17 15:02:01,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055997740] [2020-09-17 15:02:01,373 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:01,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:01,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:02:01,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:01,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:01,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:02:01,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32385874] [2020-09-17 15:02:01,482 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:01,484 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:01,494 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:02:01,494 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:01,494 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:01,495 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:01,566 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:01,566 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:01,583 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61039#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:02:01,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:02:01,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:02:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:02:01,584 INFO L87 Difference]: Start difference. First operand 99 states and 252 transitions. Second operand 29 states. [2020-09-17 15:02:04,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:04,322 INFO L93 Difference]: Finished difference Result 125 states and 306 transitions. [2020-09-17 15:02:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:02:04,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:02:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:04,325 INFO L225 Difference]: With dead ends: 125 [2020-09-17 15:02:04,325 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 15:02:04,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1400, Invalid=3712, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:02:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 15:02:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-09-17 15:02:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:02:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 258 transitions. [2020-09-17 15:02:04,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 258 transitions. Word has length 32 [2020-09-17 15:02:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:04,328 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 258 transitions. [2020-09-17 15:02:04,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:02:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 258 transitions. [2020-09-17 15:02:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:02:04,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:04,329 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:04,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:04,531 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 153 times [2020-09-17 15:02:04,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:04,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274147177] [2020-09-17 15:02:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:05,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274147177] [2020-09-17 15:02:05,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567592793] [2020-09-17 15:02:05,263 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:05,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 15:02:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:02:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:05,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:05,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:02:05,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502616313] [2020-09-17 15:02:05,392 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:05,394 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:05,426 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:02:05,426 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:05,426 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:05,426 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:05,500 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:05,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:05,519 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61574#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:02:05,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:02:05,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:02:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:02:05,520 INFO L87 Difference]: Start difference. First operand 101 states and 258 transitions. Second operand 29 states. [2020-09-17 15:02:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:08,420 INFO L93 Difference]: Finished difference Result 123 states and 304 transitions. [2020-09-17 15:02:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:02:08,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:02:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:08,422 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:02:08,422 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:02:08,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1538, Invalid=3864, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:02:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:02:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-09-17 15:02:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:02:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 264 transitions. [2020-09-17 15:02:08,425 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 264 transitions. Word has length 32 [2020-09-17 15:02:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:08,425 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 264 transitions. [2020-09-17 15:02:08,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:02:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 264 transitions. [2020-09-17 15:02:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:02:08,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:08,425 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:08,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:08,626 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 154 times [2020-09-17 15:02:08,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:08,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956836571] [2020-09-17 15:02:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:09,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956836571] [2020-09-17 15:02:09,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631593164] [2020-09-17 15:02:09,343 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:09,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:02:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:09,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:09,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:02:09,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [79855007] [2020-09-17 15:02:09,477 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:09,479 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:09,488 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:02:09,489 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:09,489 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:09,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:09,571 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:09,571 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:09,591 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62115#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:02:09,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:02:09,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:02:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:02:09,593 INFO L87 Difference]: Start difference. First operand 103 states and 264 transitions. Second operand 29 states. [2020-09-17 15:02:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:12,873 INFO L93 Difference]: Finished difference Result 123 states and 307 transitions. [2020-09-17 15:02:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:02:12,875 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:02:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:12,876 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:02:12,876 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:02:12,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1692, Invalid=4008, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:02:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:02:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-09-17 15:02:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:02:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2020-09-17 15:02:12,879 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 32 [2020-09-17 15:02:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:12,879 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2020-09-17 15:02:12,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:02:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2020-09-17 15:02:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 15:02:12,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:12,880 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:13,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:13,081 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 155 times [2020-09-17 15:02:13,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:13,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139168903] [2020-09-17 15:02:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:13,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139168903] [2020-09-17 15:02:13,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366279400] [2020-09-17 15:02:13,830 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:13,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 15:02:13,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 15:02:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:13,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:13,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 15:02:13,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [162192883] [2020-09-17 15:02:13,956 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:13,958 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:13,968 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-17 15:02:13,969 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:13,969 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:13,969 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:14,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:14,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:14,070 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62664#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:02:14,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 15:02:14,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 15:02:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-17 15:02:14,071 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand 29 states. [2020-09-17 15:02:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:17,531 INFO L93 Difference]: Finished difference Result 123 states and 315 transitions. [2020-09-17 15:02:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 15:02:17,533 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 15:02:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:17,534 INFO L225 Difference]: With dead ends: 123 [2020-09-17 15:02:17,534 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 15:02:17,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1860, Invalid=4146, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:02:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 15:02:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-09-17 15:02:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 15:02:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 15:02:17,538 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2020-09-17 15:02:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:17,538 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 15:02:17,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 15:02:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 15:02:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:17,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:17,538 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:17,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 15:02:17,739 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:17,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 156 times [2020-09-17 15:02:17,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:17,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472197609] [2020-09-17 15:02:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:18,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472197609] [2020-09-17 15:02:18,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934744580] [2020-09-17 15:02:18,802 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:18,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:02:18,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:18,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:18,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:18,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1309079092] [2020-09-17 15:02:18,906 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:18,907 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:18,919 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 53 transitions. [2020-09-17 15:02:18,919 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:18,927 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:18,927 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:18,997 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:18,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,069 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,069 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,072 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,073 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,111 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,111 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,119 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:19,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:19,129 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63167#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 15:02:19,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:19,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:19,130 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 30 states. [2020-09-17 15:02:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:21,058 INFO L93 Difference]: Finished difference Result 120 states and 280 transitions. [2020-09-17 15:02:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:02:21,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:21,061 INFO L225 Difference]: With dead ends: 120 [2020-09-17 15:02:21,061 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 15:02:21,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 15:02:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 15:02:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-17 15:02:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:02:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-17 15:02:21,064 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 33 [2020-09-17 15:02:21,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:21,064 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-17 15:02:21,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-17 15:02:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:21,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:21,065 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:21,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:21,266 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 157 times [2020-09-17 15:02:21,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:21,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762572924] [2020-09-17 15:02:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:22,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762572924] [2020-09-17 15:02:22,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430594846] [2020-09-17 15:02:22,261 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:22,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:22,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:22,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:22,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:22,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [461675893] [2020-09-17 15:02:22,355 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:22,357 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:22,367 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:22,367 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:22,367 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:22,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:22,450 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:22,450 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:22,476 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63639#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 15:02:22,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:22,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:22,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:22,478 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 30 states. [2020-09-17 15:02:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:24,391 INFO L93 Difference]: Finished difference Result 172 states and 386 transitions. [2020-09-17 15:02:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:02:24,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:24,393 INFO L225 Difference]: With dead ends: 172 [2020-09-17 15:02:24,394 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 15:02:24,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1005, Invalid=2655, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:02:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 15:02:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2020-09-17 15:02:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 15:02:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 218 transitions. [2020-09-17 15:02:24,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 218 transitions. Word has length 33 [2020-09-17 15:02:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:24,397 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 218 transitions. [2020-09-17 15:02:24,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 218 transitions. [2020-09-17 15:02:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:24,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:24,397 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:24,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 15:02:24,598 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 158 times [2020-09-17 15:02:24,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:24,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683401733] [2020-09-17 15:02:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:25,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683401733] [2020-09-17 15:02:25,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822514957] [2020-09-17 15:02:25,474 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:25,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:25,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1395940726] [2020-09-17 15:02:25,572 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:25,574 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:25,582 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:25,583 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:25,583 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:25,583 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:25,667 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:25,667 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:25,687 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64175#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:02:25,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:25,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:25,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:25,689 INFO L87 Difference]: Start difference. First operand 88 states and 218 transitions. Second operand 30 states. [2020-09-17 15:02:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:27,658 INFO L93 Difference]: Finished difference Result 169 states and 382 transitions. [2020-09-17 15:02:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:02:27,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:27,661 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:02:27,661 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:02:27,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1028, Invalid=2878, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 15:02:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:02:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2020-09-17 15:02:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:02:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2020-09-17 15:02:27,664 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 33 [2020-09-17 15:02:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:27,664 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2020-09-17 15:02:27,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2020-09-17 15:02:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:27,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:27,665 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:27,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:27,866 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 159 times [2020-09-17 15:02:27,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:27,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126348248] [2020-09-17 15:02:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:28,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126348248] [2020-09-17 15:02:28,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855307561] [2020-09-17 15:02:28,771 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:28,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:02:28,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:28,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:28,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:28,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:28,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [572044196] [2020-09-17 15:02:28,882 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:28,883 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:28,892 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:28,893 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:28,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:28,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:28,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:28,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:28,992 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64716#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:02:28,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:28,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:28,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:28,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:28,994 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand 30 states. [2020-09-17 15:02:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:31,169 INFO L93 Difference]: Finished difference Result 167 states and 380 transitions. [2020-09-17 15:02:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:02:31,171 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:31,172 INFO L225 Difference]: With dead ends: 167 [2020-09-17 15:02:31,172 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 15:02:31,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:02:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 15:02:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2020-09-17 15:02:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:02:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 230 transitions. [2020-09-17 15:02:31,176 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 230 transitions. Word has length 33 [2020-09-17 15:02:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:31,177 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 230 transitions. [2020-09-17 15:02:31,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 230 transitions. [2020-09-17 15:02:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:31,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:31,177 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:31,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-17 15:02:31,387 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 160 times [2020-09-17 15:02:31,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:31,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757070781] [2020-09-17 15:02:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:32,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757070781] [2020-09-17 15:02:32,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632371850] [2020-09-17 15:02:32,260 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:32,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:32,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:32,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:32,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143835461] [2020-09-17 15:02:32,364 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:32,366 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:32,376 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:32,376 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:32,377 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:32,377 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:32,459 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:32,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:32,478 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:02:32,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:32,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:32,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:32,480 INFO L87 Difference]: Start difference. First operand 92 states and 230 transitions. Second operand 30 states. [2020-09-17 15:02:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:34,853 INFO L93 Difference]: Finished difference Result 165 states and 378 transitions. [2020-09-17 15:02:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:02:34,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:34,856 INFO L225 Difference]: With dead ends: 165 [2020-09-17 15:02:34,856 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 15:02:34,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1122, Invalid=3300, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:02:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 15:02:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 94. [2020-09-17 15:02:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:02:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 236 transitions. [2020-09-17 15:02:34,861 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 236 transitions. Word has length 33 [2020-09-17 15:02:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:34,861 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 236 transitions. [2020-09-17 15:02:34,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 236 transitions. [2020-09-17 15:02:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:34,862 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:35,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:35,073 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 161 times [2020-09-17 15:02:35,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:35,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318622836] [2020-09-17 15:02:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:35,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318622836] [2020-09-17 15:02:35,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067980849] [2020-09-17 15:02:35,934 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:36,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:02:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:36,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:36,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:36,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:36,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2090689961] [2020-09-17 15:02:36,055 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:36,057 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:36,067 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:36,067 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:36,071 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:36,071 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:36,158 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:36,158 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:36,175 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65816#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:02:36,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:36,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:36,177 INFO L87 Difference]: Start difference. First operand 94 states and 236 transitions. Second operand 30 states. [2020-09-17 15:02:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:38,707 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2020-09-17 15:02:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:02:38,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:38,710 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:02:38,710 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:02:38,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1193, Invalid=3499, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:02:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:02:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 96. [2020-09-17 15:02:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:02:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 242 transitions. [2020-09-17 15:02:38,714 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 242 transitions. Word has length 33 [2020-09-17 15:02:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:38,714 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 242 transitions. [2020-09-17 15:02:38,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 242 transitions. [2020-09-17 15:02:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:38,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:38,714 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:38,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:38,916 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:38,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 162 times [2020-09-17 15:02:38,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:38,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507886564] [2020-09-17 15:02:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:39,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507886564] [2020-09-17 15:02:39,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934969095] [2020-09-17 15:02:39,856 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:39,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:02:39,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:39,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:39,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:39,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [98998399] [2020-09-17 15:02:39,986 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:39,988 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:39,998 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:39,998 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:39,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:39,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:40,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:40,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:40,124 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66375#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:02:40,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:40,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:40,126 INFO L87 Difference]: Start difference. First operand 96 states and 242 transitions. Second operand 30 states. [2020-09-17 15:02:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:43,823 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2020-09-17 15:02:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:02:43,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:43,826 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:02:43,826 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:02:43,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1280, Invalid=3690, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:02:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:02:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-09-17 15:02:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:02:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 248 transitions. [2020-09-17 15:02:43,829 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 248 transitions. Word has length 33 [2020-09-17 15:02:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:43,829 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 248 transitions. [2020-09-17 15:02:43,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 248 transitions. [2020-09-17 15:02:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:43,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:43,830 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:44,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:44,031 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 163 times [2020-09-17 15:02:44,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:44,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280075938] [2020-09-17 15:02:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:44,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280075938] [2020-09-17 15:02:44,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644618968] [2020-09-17 15:02:44,783 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:44,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:44,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:44,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:44,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262964598] [2020-09-17 15:02:44,891 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:44,893 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:44,902 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:44,902 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:44,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:44,903 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:44,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:44,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:44,990 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66940#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:02:44,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:44,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:44,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:44,991 INFO L87 Difference]: Start difference. First operand 98 states and 248 transitions. Second operand 30 states. [2020-09-17 15:02:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:47,691 INFO L93 Difference]: Finished difference Result 159 states and 372 transitions. [2020-09-17 15:02:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:02:47,693 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:47,693 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:02:47,694 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:02:47,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1383, Invalid=3873, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:02:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:02:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 100. [2020-09-17 15:02:47,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:02:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 254 transitions. [2020-09-17 15:02:47,697 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 254 transitions. Word has length 33 [2020-09-17 15:02:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:47,697 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 254 transitions. [2020-09-17 15:02:47,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 254 transitions. [2020-09-17 15:02:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:47,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:47,698 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:47,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:47,899 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 164 times [2020-09-17 15:02:47,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:47,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554149105] [2020-09-17 15:02:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:48,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554149105] [2020-09-17 15:02:48,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527136562] [2020-09-17 15:02:48,701 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:48,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:02:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:48,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:48,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:48,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:48,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1576676279] [2020-09-17 15:02:48,815 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:48,817 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:48,826 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:48,826 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:48,827 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:48,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:48,900 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:48,900 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:48,920 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [67511#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:02:48,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:48,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:48,921 INFO L87 Difference]: Start difference. First operand 100 states and 254 transitions. Second operand 30 states. [2020-09-17 15:02:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:51,767 INFO L93 Difference]: Finished difference Result 157 states and 370 transitions. [2020-09-17 15:02:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:02:51,768 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:51,768 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:02:51,768 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:02:51,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1502, Invalid=4048, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:02:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:02:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 102. [2020-09-17 15:02:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:02:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 260 transitions. [2020-09-17 15:02:51,770 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 260 transitions. Word has length 33 [2020-09-17 15:02:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:51,771 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 260 transitions. [2020-09-17 15:02:51,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 260 transitions. [2020-09-17 15:02:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:51,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:51,771 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:51,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-17 15:02:51,973 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 165 times [2020-09-17 15:02:51,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:51,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962578298] [2020-09-17 15:02:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:52,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962578298] [2020-09-17 15:02:52,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073854319] [2020-09-17 15:02:52,737 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:52,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:02:52,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:52,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:52,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:52,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1118702858] [2020-09-17 15:02:52,866 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:52,878 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:52,887 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:52,887 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:52,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:52,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:52,960 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:52,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:52,978 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68088#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:02:52,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:52,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:52,980 INFO L87 Difference]: Start difference. First operand 102 states and 260 transitions. Second operand 30 states. [2020-09-17 15:02:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:02:55,977 INFO L93 Difference]: Finished difference Result 155 states and 368 transitions. [2020-09-17 15:02:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:02:55,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:02:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:02:55,979 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:02:55,979 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:02:55,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1637, Invalid=4215, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:02:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:02:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2020-09-17 15:02:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:02:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 266 transitions. [2020-09-17 15:02:55,982 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 266 transitions. Word has length 33 [2020-09-17 15:02:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:02:55,982 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 266 transitions. [2020-09-17 15:02:55,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:02:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 266 transitions. [2020-09-17 15:02:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:02:55,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:02:55,983 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:02:56,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 15:02:56,184 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:02:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:02:56,184 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 166 times [2020-09-17 15:02:56,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:02:56,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907088227] [2020-09-17 15:02:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:02:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:02:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:56,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907088227] [2020-09-17 15:02:56,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736926359] [2020-09-17 15:02:56,965 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:02:57,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:02:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:02:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:02:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:02:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:02:57,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:02:57,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:02:57,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460943624] [2020-09-17 15:02:57,110 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:02:57,112 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:02:57,133 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:02:57,133 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:02:57,134 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:57,134 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:57,204 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:02:57,204 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:02:57,222 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68671#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:02:57,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:02:57,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:02:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:02:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:02:57,223 INFO L87 Difference]: Start difference. First operand 104 states and 266 transitions. Second operand 30 states. [2020-09-17 15:03:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:00,350 INFO L93 Difference]: Finished difference Result 153 states and 366 transitions. [2020-09-17 15:03:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:03:00,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:03:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:00,353 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:03:00,353 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:03:00,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1788, Invalid=4374, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:03:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:03:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-09-17 15:03:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:03:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 272 transitions. [2020-09-17 15:03:00,356 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 272 transitions. Word has length 33 [2020-09-17 15:03:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:00,356 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 272 transitions. [2020-09-17 15:03:00,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:03:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 272 transitions. [2020-09-17 15:03:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:03:00,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:00,357 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:00,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:00,558 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 167 times [2020-09-17 15:03:00,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:00,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396433649] [2020-09-17 15:03:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:01,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396433649] [2020-09-17 15:03:01,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398720494] [2020-09-17 15:03:01,373 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:01,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:03:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:03:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:01,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:01,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:03:01,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [622499799] [2020-09-17 15:03:01,504 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:01,506 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:01,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:03:01,517 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:01,517 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:01,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:01,596 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:01,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:01,615 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69260#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:03:01,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:03:01,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:03:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:03:01,616 INFO L87 Difference]: Start difference. First operand 106 states and 272 transitions. Second operand 30 states. [2020-09-17 15:03:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:05,002 INFO L93 Difference]: Finished difference Result 153 states and 369 transitions. [2020-09-17 15:03:05,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:03:05,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:03:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:05,005 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:03:05,006 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:03:05,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1955, Invalid=4525, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:03:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:03:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2020-09-17 15:03:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:03:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 280 transitions. [2020-09-17 15:03:05,009 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 280 transitions. Word has length 33 [2020-09-17 15:03:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:05,009 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 280 transitions. [2020-09-17 15:03:05,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:03:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 280 transitions. [2020-09-17 15:03:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 15:03:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:05,010 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:05,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 15:03:05,211 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 168 times [2020-09-17 15:03:05,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:05,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729476939] [2020-09-17 15:03:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:05,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729476939] [2020-09-17 15:03:05,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177238671] [2020-09-17 15:03:05,953 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:06,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:03:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:06,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 15:03:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:06,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:06,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 15:03:06,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [572647439] [2020-09-17 15:03:06,086 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:06,088 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:06,100 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-17 15:03:06,101 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:06,102 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:06,102 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:06,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:06,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:06,239 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69857#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:03:06,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 15:03:06,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 15:03:06,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-09-17 15:03:06,240 INFO L87 Difference]: Start difference. First operand 108 states and 280 transitions. Second operand 30 states. [2020-09-17 15:03:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:09,754 INFO L93 Difference]: Finished difference Result 154 states and 379 transitions. [2020-09-17 15:03:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 15:03:09,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 15:03:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:09,756 INFO L225 Difference]: With dead ends: 154 [2020-09-17 15:03:09,756 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 15:03:09,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2136, Invalid=4670, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:03:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 15:03:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2020-09-17 15:03:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:03:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-17 15:03:09,760 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 33 [2020-09-17 15:03:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:09,760 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-17 15:03:09,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 15:03:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-17 15:03:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:09,761 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:09,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 15:03:09,969 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:09,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 169 times [2020-09-17 15:03:09,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:09,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050307630] [2020-09-17 15:03:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:10,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050307630] [2020-09-17 15:03:10,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522103001] [2020-09-17 15:03:10,947 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:11,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:11,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:11,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:11,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:11,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [955714003] [2020-09-17 15:03:11,050 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:11,052 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:11,062 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 50 transitions. [2020-09-17 15:03:11,062 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:11,065 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:11,065 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:11,160 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:11,160 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:11,187 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70411#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:03:11,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:11,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:11,188 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 31 states. [2020-09-17 15:03:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:13,029 INFO L93 Difference]: Finished difference Result 150 states and 342 transitions. [2020-09-17 15:03:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 15:03:13,030 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:13,031 INFO L225 Difference]: With dead ends: 150 [2020-09-17 15:03:13,032 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 15:03:13,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1007, Invalid=2533, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 15:03:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 15:03:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2020-09-17 15:03:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 15:03:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 220 transitions. [2020-09-17 15:03:13,036 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 220 transitions. Word has length 34 [2020-09-17 15:03:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:13,036 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 220 transitions. [2020-09-17 15:03:13,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 220 transitions. [2020-09-17 15:03:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:13,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:13,037 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:13,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-17 15:03:13,246 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 170 times [2020-09-17 15:03:13,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:13,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494358491] [2020-09-17 15:03:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:14,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494358491] [2020-09-17 15:03:14,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560645997] [2020-09-17 15:03:14,272 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:14,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:03:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:14,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:14,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:14,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:14,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [948751273] [2020-09-17 15:03:14,370 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:14,372 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:14,382 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:14,383 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:14,383 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:14,383 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:14,462 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:14,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:14,484 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70927#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:03:14,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:14,485 INFO L87 Difference]: Start difference. First operand 89 states and 220 transitions. Second operand 31 states. [2020-09-17 15:03:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:16,531 INFO L93 Difference]: Finished difference Result 147 states and 338 transitions. [2020-09-17 15:03:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:03:16,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:16,534 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:03:16,534 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:03:16,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1015, Invalid=2767, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 15:03:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:03:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2020-09-17 15:03:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 15:03:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 226 transitions. [2020-09-17 15:03:16,537 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 226 transitions. Word has length 34 [2020-09-17 15:03:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:16,537 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 226 transitions. [2020-09-17 15:03:16,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 226 transitions. [2020-09-17 15:03:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:16,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:16,538 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:16,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:16,739 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 171 times [2020-09-17 15:03:16,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:16,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762393713] [2020-09-17 15:03:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762393713] [2020-09-17 15:03:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11749105] [2020-09-17 15:03:17,697 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:17,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:03:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:17,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:17,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:17,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1044959371] [2020-09-17 15:03:17,812 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:17,814 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:17,825 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:17,825 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:17,825 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:17,826 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:17,914 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:17,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:17,936 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71448#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:03:17,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:17,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:17,938 INFO L87 Difference]: Start difference. First operand 91 states and 226 transitions. Second operand 31 states. [2020-09-17 15:03:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:20,142 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-17 15:03:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:03:20,144 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:20,145 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:03:20,145 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:03:20,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1039, Invalid=2993, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:03:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:03:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2020-09-17 15:03:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:03:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 232 transitions. [2020-09-17 15:03:20,148 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 232 transitions. Word has length 34 [2020-09-17 15:03:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:20,148 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 232 transitions. [2020-09-17 15:03:20,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 232 transitions. [2020-09-17 15:03:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:20,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:20,149 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:20,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 15:03:20,352 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 172 times [2020-09-17 15:03:20,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:20,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215846857] [2020-09-17 15:03:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:21,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215846857] [2020-09-17 15:03:21,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289888618] [2020-09-17 15:03:21,275 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:21,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:03:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:21,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:21,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:21,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [754768149] [2020-09-17 15:03:21,381 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:21,383 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:21,393 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:21,393 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:21,396 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,396 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:21,472 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:21,490 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71975#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:03:21,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:21,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:21,491 INFO L87 Difference]: Start difference. First operand 93 states and 232 transitions. Second operand 31 states. [2020-09-17 15:03:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:23,774 INFO L93 Difference]: Finished difference Result 143 states and 334 transitions. [2020-09-17 15:03:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:03:23,776 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:23,776 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:03:23,776 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:03:23,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1079, Invalid=3211, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:03:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:03:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2020-09-17 15:03:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:03:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 238 transitions. [2020-09-17 15:03:23,778 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 238 transitions. Word has length 34 [2020-09-17 15:03:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:23,779 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 238 transitions. [2020-09-17 15:03:23,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 238 transitions. [2020-09-17 15:03:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:23,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:23,779 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:23,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:23,980 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 173 times [2020-09-17 15:03:23,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:23,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505246824] [2020-09-17 15:03:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:24,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505246824] [2020-09-17 15:03:24,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104577749] [2020-09-17 15:03:24,954 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:25,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:03:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:25,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:25,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:25,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:25,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783496928] [2020-09-17 15:03:25,069 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:25,071 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:25,081 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:25,082 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:25,082 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:25,082 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:25,161 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:25,161 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:25,182 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72508#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:03:25,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:25,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:25,184 INFO L87 Difference]: Start difference. First operand 95 states and 238 transitions. Second operand 31 states. [2020-09-17 15:03:27,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:27,739 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-17 15:03:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:03:27,741 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:27,742 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:03:27,742 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:03:27,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1135, Invalid=3421, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:03:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:03:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2020-09-17 15:03:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:03:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 244 transitions. [2020-09-17 15:03:27,745 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 244 transitions. Word has length 34 [2020-09-17 15:03:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:27,745 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 244 transitions. [2020-09-17 15:03:27,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 244 transitions. [2020-09-17 15:03:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:27,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:27,746 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:27,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:27,947 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 174 times [2020-09-17 15:03:27,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:27,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075939172] [2020-09-17 15:03:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:28,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075939172] [2020-09-17 15:03:28,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273425794] [2020-09-17 15:03:28,926 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:29,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:03:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:29,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:29,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:29,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:29,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323987070] [2020-09-17 15:03:29,047 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:29,049 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:29,061 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:29,061 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:29,063 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:29,064 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:29,174 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:29,174 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:29,204 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73047#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:03:29,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:29,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:29,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:29,205 INFO L87 Difference]: Start difference. First operand 97 states and 244 transitions. Second operand 31 states. [2020-09-17 15:03:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:32,930 INFO L93 Difference]: Finished difference Result 139 states and 330 transitions. [2020-09-17 15:03:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:03:32,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:32,933 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:03:32,933 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:03:32,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1207, Invalid=3623, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:03:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:03:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-17 15:03:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:03:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 250 transitions. [2020-09-17 15:03:32,936 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 250 transitions. Word has length 34 [2020-09-17 15:03:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:32,936 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 250 transitions. [2020-09-17 15:03:32,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 250 transitions. [2020-09-17 15:03:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:32,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:32,937 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:33,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:33,138 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:33,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:33,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 175 times [2020-09-17 15:03:33,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:33,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612550953] [2020-09-17 15:03:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:34,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612550953] [2020-09-17 15:03:34,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058570589] [2020-09-17 15:03:34,123 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:34,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:34,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:34,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896209149] [2020-09-17 15:03:34,253 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:34,255 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:34,265 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:34,265 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:34,268 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:34,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:34,365 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:34,366 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:34,387 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73592#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:03:34,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:34,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:34,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:34,388 INFO L87 Difference]: Start difference. First operand 99 states and 250 transitions. Second operand 31 states. [2020-09-17 15:03:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:37,636 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2020-09-17 15:03:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:03:37,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:37,637 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:03:37,637 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:03:37,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1295, Invalid=3817, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:03:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:03:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-17 15:03:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:03:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2020-09-17 15:03:37,640 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 34 [2020-09-17 15:03:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:37,640 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2020-09-17 15:03:37,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2020-09-17 15:03:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:37,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:37,640 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:37,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:37,841 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 176 times [2020-09-17 15:03:37,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:37,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792767685] [2020-09-17 15:03:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:38,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792767685] [2020-09-17 15:03:38,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344256090] [2020-09-17 15:03:38,784 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:38,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:03:38,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:38,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:38,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:38,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:38,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:38,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822659301] [2020-09-17 15:03:38,910 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:38,912 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:38,924 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:38,925 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:38,927 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:38,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:39,019 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:39,019 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:39,040 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74143#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:03:39,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:39,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:39,042 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand 31 states. [2020-09-17 15:03:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:42,376 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2020-09-17 15:03:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:03:42,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:42,380 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:03:42,380 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:03:42,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1399, Invalid=4003, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:03:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:03:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2020-09-17 15:03:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:03:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2020-09-17 15:03:42,384 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 34 [2020-09-17 15:03:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:42,384 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2020-09-17 15:03:42,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2020-09-17 15:03:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:42,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:42,385 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:42,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-17 15:03:42,586 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 177 times [2020-09-17 15:03:42,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:42,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122730506] [2020-09-17 15:03:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:43,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122730506] [2020-09-17 15:03:43,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710123797] [2020-09-17 15:03:43,529 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:43,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 15:03:43,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:43,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:43,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:43,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [163136045] [2020-09-17 15:03:43,658 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:43,660 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:43,877 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:43,877 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:43,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:43,880 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:43,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:43,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:43,995 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74700#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:03:43,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:43,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:43,997 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand 31 states. [2020-09-17 15:03:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:47,549 INFO L93 Difference]: Finished difference Result 133 states and 324 transitions. [2020-09-17 15:03:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:03:47,551 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:47,552 INFO L225 Difference]: With dead ends: 133 [2020-09-17 15:03:47,552 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 15:03:47,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1519, Invalid=4181, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:03:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 15:03:47,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2020-09-17 15:03:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:03:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 268 transitions. [2020-09-17 15:03:47,555 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 268 transitions. Word has length 34 [2020-09-17 15:03:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:47,556 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 268 transitions. [2020-09-17 15:03:47,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 268 transitions. [2020-09-17 15:03:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:47,556 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:47,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 15:03:47,759 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:47,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 178 times [2020-09-17 15:03:47,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:47,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841236051] [2020-09-17 15:03:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:48,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841236051] [2020-09-17 15:03:48,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495188819] [2020-09-17 15:03:48,700 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:48,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:03:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:48,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:48,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:48,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:48,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115105181] [2020-09-17 15:03:48,831 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:48,833 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:48,844 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:48,845 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:48,847 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:48,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:48,946 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:48,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:48,970 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75263#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:03:48,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:48,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:48,972 INFO L87 Difference]: Start difference. First operand 105 states and 268 transitions. Second operand 31 states. [2020-09-17 15:03:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:52,327 INFO L93 Difference]: Finished difference Result 131 states and 322 transitions. [2020-09-17 15:03:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:03:52,328 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:52,329 INFO L225 Difference]: With dead ends: 131 [2020-09-17 15:03:52,329 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 15:03:52,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1655, Invalid=4351, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:03:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 15:03:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2020-09-17 15:03:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:03:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 274 transitions. [2020-09-17 15:03:52,332 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 274 transitions. Word has length 34 [2020-09-17 15:03:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:52,332 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 274 transitions. [2020-09-17 15:03:52,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 274 transitions. [2020-09-17 15:03:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:52,333 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:52,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 15:03:52,534 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 179 times [2020-09-17 15:03:52,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:52,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926323179] [2020-09-17 15:03:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:53,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926323179] [2020-09-17 15:03:53,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219179079] [2020-09-17 15:03:53,293 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:53,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 15:03:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:53,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:53,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:53,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1810521238] [2020-09-17 15:03:53,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:53,419 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:53,428 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:53,428 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:53,430 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:53,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:53,503 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:53,503 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:53,558 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75832#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:03:53,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:53,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:53,559 INFO L87 Difference]: Start difference. First operand 107 states and 274 transitions. Second operand 31 states. [2020-09-17 15:03:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:03:56,810 INFO L93 Difference]: Finished difference Result 129 states and 320 transitions. [2020-09-17 15:03:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:03:56,812 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:03:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:03:56,813 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:03:56,813 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:03:56,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1807, Invalid=4513, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:03:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:03:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-09-17 15:03:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:03:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 280 transitions. [2020-09-17 15:03:56,817 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 280 transitions. Word has length 34 [2020-09-17 15:03:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:03:56,817 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 280 transitions. [2020-09-17 15:03:56,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:03:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 280 transitions. [2020-09-17 15:03:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:03:56,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:03:56,817 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:03:57,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:57,018 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:03:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:03:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 180 times [2020-09-17 15:03:57,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:03:57,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286813167] [2020-09-17 15:03:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:03:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:03:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:57,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286813167] [2020-09-17 15:03:57,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77370593] [2020-09-17 15:03:57,761 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:03:57,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 15:03:57,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:03:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:03:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:03:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:03:57,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:03:57,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:03:57,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [242791797] [2020-09-17 15:03:57,881 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:03:57,883 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:03:57,893 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:03:57,893 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:03:57,894 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:57,894 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:57,979 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:03:57,979 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:03:57,995 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76407#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:03:57,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:03:57,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:03:57,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:03:57,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:03:57,996 INFO L87 Difference]: Start difference. First operand 109 states and 280 transitions. Second operand 31 states. [2020-09-17 15:04:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:01,364 INFO L93 Difference]: Finished difference Result 129 states and 323 transitions. [2020-09-17 15:04:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:04:01,365 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:04:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:01,366 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:04:01,366 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:04:01,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1975, Invalid=4667, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:04:01,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:04:01,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2020-09-17 15:04:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:04:01,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 288 transitions. [2020-09-17 15:04:01,369 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 288 transitions. Word has length 34 [2020-09-17 15:04:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:01,369 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 288 transitions. [2020-09-17 15:04:01,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:04:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 288 transitions. [2020-09-17 15:04:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 15:04:01,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:01,370 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:01,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:01,571 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 181 times [2020-09-17 15:04:01,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:01,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174670363] [2020-09-17 15:04:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:02,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174670363] [2020-09-17 15:04:02,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109671515] [2020-09-17 15:04:02,329 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:02,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 15:04:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:02,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:02,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 15:04:02,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2099653531] [2020-09-17 15:04:02,451 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:02,454 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:02,463 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-17 15:04:02,463 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:02,464 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:02,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:02,535 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:02,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:02,552 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76990#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-17 15:04:02,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 15:04:02,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 15:04:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-17 15:04:02,553 INFO L87 Difference]: Start difference. First operand 111 states and 288 transitions. Second operand 31 states. [2020-09-17 15:04:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:05,998 INFO L93 Difference]: Finished difference Result 129 states and 331 transitions. [2020-09-17 15:04:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 15:04:06,000 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 15:04:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:06,001 INFO L225 Difference]: With dead ends: 129 [2020-09-17 15:04:06,001 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 15:04:06,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2157, Invalid=4815, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:04:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 15:04:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2020-09-17 15:04:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 15:04:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-17 15:04:06,004 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 34 [2020-09-17 15:04:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:06,004 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-17 15:04:06,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 15:04:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-17 15:04:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:06,005 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:06,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:06,205 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 182 times [2020-09-17 15:04:06,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:06,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683146082] [2020-09-17 15:04:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:07,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683146082] [2020-09-17 15:04:07,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919469701] [2020-09-17 15:04:07,183 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:07,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:07,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:07,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406271976] [2020-09-17 15:04:07,272 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:07,274 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:07,284 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-17 15:04:07,284 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:07,284 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,349 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,350 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,403 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,403 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,430 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,437 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,491 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,491 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,504 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:07,505 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:07,520 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [77523#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 15:04:07,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:07,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:07,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:07,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:07,521 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 32 states. [2020-09-17 15:04:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:09,288 INFO L93 Difference]: Finished difference Result 126 states and 294 transitions. [2020-09-17 15:04:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:04:09,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:09,291 INFO L225 Difference]: With dead ends: 126 [2020-09-17 15:04:09,291 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 15:04:09,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1081, Invalid=2579, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 15:04:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 15:04:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-09-17 15:04:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:04:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-17 15:04:09,294 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 35 [2020-09-17 15:04:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:09,294 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-17 15:04:09,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-17 15:04:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:09,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:09,294 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:09,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:09,495 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 183 times [2020-09-17 15:04:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:09,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582939419] [2020-09-17 15:04:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:10,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582939419] [2020-09-17 15:04:10,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709754428] [2020-09-17 15:04:10,484 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:10,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:10,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:10,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:10,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:10,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360375548] [2020-09-17 15:04:10,596 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:10,599 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:10,613 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:10,614 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:10,614 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:10,615 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:10,693 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:10,693 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:10,706 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78021#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 15:04:10,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:10,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:10,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:10,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:10,707 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 32 states. [2020-09-17 15:04:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:12,625 INFO L93 Difference]: Finished difference Result 182 states and 408 transitions. [2020-09-17 15:04:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:04:12,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:12,627 INFO L225 Difference]: With dead ends: 182 [2020-09-17 15:04:12,627 INFO L226 Difference]: Without dead ends: 176 [2020-09-17 15:04:12,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1148, Invalid=3012, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:04:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-17 15:04:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2020-09-17 15:04:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 15:04:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2020-09-17 15:04:12,630 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 35 [2020-09-17 15:04:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:12,630 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2020-09-17 15:04:12,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2020-09-17 15:04:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:12,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:12,631 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:12,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:12,832 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:12,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 184 times [2020-09-17 15:04:12,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:12,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311006735] [2020-09-17 15:04:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311006735] [2020-09-17 15:04:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448517716] [2020-09-17 15:04:13,771 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:13,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:04:13,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:13,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:13,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:13,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2070535783] [2020-09-17 15:04:13,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:13,869 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:13,879 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:13,879 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:13,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:13,880 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:13,950 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:13,950 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:13,966 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78587#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:04:13,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:13,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:13,967 INFO L87 Difference]: Start difference. First operand 92 states and 228 transitions. Second operand 32 states. [2020-09-17 15:04:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:15,999 INFO L93 Difference]: Finished difference Result 179 states and 404 transitions. [2020-09-17 15:04:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:04:16,001 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:16,001 INFO L225 Difference]: With dead ends: 179 [2020-09-17 15:04:16,001 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 15:04:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1169, Invalid=3253, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 15:04:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 15:04:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2020-09-17 15:04:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:04:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 234 transitions. [2020-09-17 15:04:16,004 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 234 transitions. Word has length 35 [2020-09-17 15:04:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:16,004 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 234 transitions. [2020-09-17 15:04:16,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 234 transitions. [2020-09-17 15:04:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:16,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:16,005 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:16,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:16,206 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 185 times [2020-09-17 15:04:16,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:16,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058364681] [2020-09-17 15:04:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:17,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058364681] [2020-09-17 15:04:17,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052353923] [2020-09-17 15:04:17,138 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:17,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:04:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:17,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:17,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:17,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [905579898] [2020-09-17 15:04:17,244 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:17,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:17,255 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:17,255 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:17,258 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:17,259 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:17,337 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:17,338 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:17,352 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79158#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:04:17,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:17,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:17,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:17,353 INFO L87 Difference]: Start difference. First operand 94 states and 234 transitions. Second operand 32 states. [2020-09-17 15:04:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:19,516 INFO L93 Difference]: Finished difference Result 177 states and 402 transitions. [2020-09-17 15:04:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:04:19,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:19,519 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:04:19,519 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:04:19,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1206, Invalid=3486, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:04:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:04:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 96. [2020-09-17 15:04:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:04:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 240 transitions. [2020-09-17 15:04:19,523 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 240 transitions. Word has length 35 [2020-09-17 15:04:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:19,523 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 240 transitions. [2020-09-17 15:04:19,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 240 transitions. [2020-09-17 15:04:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:19,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:19,523 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:19,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:19,724 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 186 times [2020-09-17 15:04:19,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:19,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65298697] [2020-09-17 15:04:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:20,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65298697] [2020-09-17 15:04:20,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105936442] [2020-09-17 15:04:20,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:20,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:04:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:20,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:20,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:20,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:20,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1037356411] [2020-09-17 15:04:20,632 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:20,635 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:20,644 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:20,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:20,648 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:20,648 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:20,727 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:20,728 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:20,745 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79735#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:04:20,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:20,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:20,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:20,746 INFO L87 Difference]: Start difference. First operand 96 states and 240 transitions. Second operand 32 states. [2020-09-17 15:04:23,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:23,088 INFO L93 Difference]: Finished difference Result 175 states and 400 transitions. [2020-09-17 15:04:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:04:23,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:23,089 INFO L225 Difference]: With dead ends: 175 [2020-09-17 15:04:23,089 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 15:04:23,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1259, Invalid=3711, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:04:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 15:04:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2020-09-17 15:04:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:04:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 246 transitions. [2020-09-17 15:04:23,092 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 246 transitions. Word has length 35 [2020-09-17 15:04:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:23,093 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 246 transitions. [2020-09-17 15:04:23,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 246 transitions. [2020-09-17 15:04:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:23,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:23,093 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:23,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:23,294 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 187 times [2020-09-17 15:04:23,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:23,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476225014] [2020-09-17 15:04:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476225014] [2020-09-17 15:04:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748193868] [2020-09-17 15:04:24,080 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:24,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:24,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:24,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [567855619] [2020-09-17 15:04:24,183 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:24,186 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:24,198 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:24,199 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:24,202 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:24,203 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:24,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:24,270 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:24,283 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80318#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:04:24,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:24,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:24,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:24,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:24,284 INFO L87 Difference]: Start difference. First operand 98 states and 246 transitions. Second operand 32 states. [2020-09-17 15:04:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:26,612 INFO L93 Difference]: Finished difference Result 173 states and 398 transitions. [2020-09-17 15:04:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:04:26,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:26,613 INFO L225 Difference]: With dead ends: 173 [2020-09-17 15:04:26,613 INFO L226 Difference]: Without dead ends: 167 [2020-09-17 15:04:26,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1328, Invalid=3928, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:04:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-17 15:04:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 100. [2020-09-17 15:04:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:04:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 252 transitions. [2020-09-17 15:04:26,616 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 252 transitions. Word has length 35 [2020-09-17 15:04:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:26,617 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 252 transitions. [2020-09-17 15:04:26,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 252 transitions. [2020-09-17 15:04:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:26,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:26,617 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:26,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:26,818 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:26,819 INFO L82 PathProgramCache]: Analyzing trace with hash 805590871, now seen corresponding path program 188 times [2020-09-17 15:04:26,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:26,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462822589] [2020-09-17 15:04:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:27,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462822589] [2020-09-17 15:04:27,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380696576] [2020-09-17 15:04:27,581 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:27,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:27,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:27,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:27,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:27,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:27,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [269966718] [2020-09-17 15:04:27,682 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:27,684 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:27,708 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:27,708 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:27,709 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:27,709 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:27,776 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:27,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:27,792 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80907#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:04:27,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:27,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:27,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:27,793 INFO L87 Difference]: Start difference. First operand 100 states and 252 transitions. Second operand 32 states. [2020-09-17 15:04:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:30,362 INFO L93 Difference]: Finished difference Result 171 states and 396 transitions. [2020-09-17 15:04:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:04:30,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:30,365 INFO L225 Difference]: With dead ends: 171 [2020-09-17 15:04:30,365 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 15:04:30,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1413, Invalid=4137, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:04:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 15:04:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 102. [2020-09-17 15:04:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:04:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 258 transitions. [2020-09-17 15:04:30,368 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 258 transitions. Word has length 35 [2020-09-17 15:04:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:30,368 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 258 transitions. [2020-09-17 15:04:30,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 258 transitions. [2020-09-17 15:04:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:30,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:30,369 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:30,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 15:04:30,570 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash 47318841, now seen corresponding path program 189 times [2020-09-17 15:04:30,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:30,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368160735] [2020-09-17 15:04:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:31,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368160735] [2020-09-17 15:04:31,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030434104] [2020-09-17 15:04:31,320 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:31,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:31,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:31,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:31,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:31,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065409488] [2020-09-17 15:04:31,433 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:31,435 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:31,444 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:31,444 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:31,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:31,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:31,515 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:31,515 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:31,528 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [81502#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:04:31,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:31,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:31,529 INFO L87 Difference]: Start difference. First operand 102 states and 258 transitions. Second operand 32 states. [2020-09-17 15:04:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:34,284 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-17 15:04:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:04:34,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:34,287 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:04:34,287 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:04:34,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:04:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:04:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2020-09-17 15:04:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:04:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-09-17 15:04:34,290 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 35 [2020-09-17 15:04:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:34,290 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-09-17 15:04:34,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-09-17 15:04:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:34,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:34,290 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:34,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:34,495 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1683077221, now seen corresponding path program 190 times [2020-09-17 15:04:34,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:34,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583286452] [2020-09-17 15:04:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:35,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583286452] [2020-09-17 15:04:35,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873927866] [2020-09-17 15:04:35,247 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:35,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:04:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:35,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:35,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:35,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1891803066] [2020-09-17 15:04:35,352 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:35,354 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:35,364 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:35,364 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:35,367 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:35,367 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:35,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:35,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:35,449 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82103#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:04:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:35,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:35,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:35,450 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 32 states. [2020-09-17 15:04:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:38,271 INFO L93 Difference]: Finished difference Result 167 states and 392 transitions. [2020-09-17 15:04:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:04:38,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:38,273 INFO L225 Difference]: With dead ends: 167 [2020-09-17 15:04:38,273 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 15:04:38,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1631, Invalid=4531, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:04:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 15:04:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 106. [2020-09-17 15:04:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:04:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-09-17 15:04:38,277 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 35 [2020-09-17 15:04:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:38,277 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-09-17 15:04:38,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-09-17 15:04:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:38,278 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:38,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-17 15:04:38,484 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1979922557, now seen corresponding path program 191 times [2020-09-17 15:04:38,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:38,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221227404] [2020-09-17 15:04:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:39,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221227404] [2020-09-17 15:04:39,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667586539] [2020-09-17 15:04:39,221 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:39,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:04:39,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:39,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:39,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:39,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1560797012] [2020-09-17 15:04:39,351 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:39,353 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:39,362 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:39,362 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:39,365 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:39,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:39,433 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:39,433 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:39,447 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82710#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:04:39,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:39,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:39,449 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 32 states. [2020-09-17 15:04:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:42,442 INFO L93 Difference]: Finished difference Result 165 states and 390 transitions. [2020-09-17 15:04:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:04:42,444 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:42,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:42,445 INFO L225 Difference]: With dead ends: 165 [2020-09-17 15:04:42,445 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 15:04:42,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1764, Invalid=4716, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:04:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 15:04:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2020-09-17 15:04:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:04:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 276 transitions. [2020-09-17 15:04:42,448 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 276 transitions. Word has length 35 [2020-09-17 15:04:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:42,448 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 276 transitions. [2020-09-17 15:04:42,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 276 transitions. [2020-09-17 15:04:42,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:42,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:42,449 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:42,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:42,650 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash 558037471, now seen corresponding path program 192 times [2020-09-17 15:04:42,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:42,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121636200] [2020-09-17 15:04:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121636200] [2020-09-17 15:04:43,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667237689] [2020-09-17 15:04:43,427 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:43,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:04:43,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:43,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:43,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:43,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:43,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:43,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769884660] [2020-09-17 15:04:43,561 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:43,563 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:43,572 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:43,573 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:43,573 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:43,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:43,645 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:43,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:43,662 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83323#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:04:43,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:43,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:43,664 INFO L87 Difference]: Start difference. First operand 108 states and 276 transitions. Second operand 32 states. [2020-09-17 15:04:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:46,865 INFO L93 Difference]: Finished difference Result 163 states and 388 transitions. [2020-09-17 15:04:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:04:46,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:46,867 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:04:46,867 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:04:46,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1913, Invalid=4893, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:04:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:04:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-09-17 15:04:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:04:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 282 transitions. [2020-09-17 15:04:46,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 282 transitions. Word has length 35 [2020-09-17 15:04:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:46,871 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 282 transitions. [2020-09-17 15:04:46,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 282 transitions. [2020-09-17 15:04:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:46,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:46,871 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:47,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:47,072 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1561875519, now seen corresponding path program 193 times [2020-09-17 15:04:47,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:47,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111535347] [2020-09-17 15:04:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:47,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111535347] [2020-09-17 15:04:47,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001364274] [2020-09-17 15:04:47,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:47,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:47,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:47,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:47,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1602298018] [2020-09-17 15:04:47,972 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:47,974 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:47,984 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:47,985 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:47,985 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:47,985 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:48,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:48,058 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:48,075 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83942#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:04:48,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:48,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:48,076 INFO L87 Difference]: Start difference. First operand 110 states and 282 transitions. Second operand 32 states. [2020-09-17 15:04:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:51,482 INFO L93 Difference]: Finished difference Result 161 states and 386 transitions. [2020-09-17 15:04:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:04:51,484 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:51,484 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:04:51,484 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:04:51,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2078, Invalid=5062, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:04:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:04:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2020-09-17 15:04:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:04:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 288 transitions. [2020-09-17 15:04:51,487 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 288 transitions. Word has length 35 [2020-09-17 15:04:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:51,488 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 288 transitions. [2020-09-17 15:04:51,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 288 transitions. [2020-09-17 15:04:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:51,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:51,488 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:51,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-17 15:04:51,689 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1483959843, now seen corresponding path program 194 times [2020-09-17 15:04:51,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:51,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244238376] [2020-09-17 15:04:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:52,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244238376] [2020-09-17 15:04:52,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379926305] [2020-09-17 15:04:52,448 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:52,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:04:52,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:52,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:52,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:52,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1320724239] [2020-09-17 15:04:52,584 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:52,586 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:52,596 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:52,596 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:52,596 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:52,597 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:52,671 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:52,672 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:52,724 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [84567#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:04:52,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:52,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:52,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:52,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:52,726 INFO L87 Difference]: Start difference. First operand 112 states and 288 transitions. Second operand 32 states. [2020-09-17 15:04:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:56,121 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-09-17 15:04:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:04:56,123 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:04:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:56,124 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:04:56,124 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:04:56,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2259, Invalid=5223, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:04:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:04:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2020-09-17 15:04:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:04:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 296 transitions. [2020-09-17 15:04:56,127 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 296 transitions. Word has length 35 [2020-09-17 15:04:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:56,127 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 296 transitions. [2020-09-17 15:04:56,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:04:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 296 transitions. [2020-09-17 15:04:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 15:04:56,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:56,128 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:56,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:56,329 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:04:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:56,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1500537093, now seen corresponding path program 195 times [2020-09-17 15:04:56,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:56,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641636106] [2020-09-17 15:04:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:57,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641636106] [2020-09-17 15:04:57,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978127696] [2020-09-17 15:04:57,095 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:04:57,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:04:57,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:04:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-17 15:04:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:04:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:57,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:04:57,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-17 15:04:57,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2011785837] [2020-09-17 15:04:57,227 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:57,229 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:57,239 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-17 15:04:57,239 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:57,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:57,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:57,335 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:04:57,335 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:04:57,352 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85200#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:04:57,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 15:04:57,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 15:04:57,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-09-17 15:04:57,353 INFO L87 Difference]: Start difference. First operand 114 states and 296 transitions. Second operand 32 states. [2020-09-17 15:05:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:00,881 INFO L93 Difference]: Finished difference Result 162 states and 399 transitions. [2020-09-17 15:05:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-17 15:05:00,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-17 15:05:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:00,883 INFO L225 Difference]: With dead ends: 162 [2020-09-17 15:05:00,883 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 15:05:00,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2454, Invalid=5378, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:05:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 15:05:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2020-09-17 15:05:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:05:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-17 15:05:00,886 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 35 [2020-09-17 15:05:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:00,887 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-17 15:05:00,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 15:05:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-17 15:05:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:00,887 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:01,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:01,088 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 581302646, now seen corresponding path program 196 times [2020-09-17 15:05:01,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:01,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540218904] [2020-09-17 15:05:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:02,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540218904] [2020-09-17 15:05:02,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825481942] [2020-09-17 15:05:02,112 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:02,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:05:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:02,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:02,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:02,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1321474605] [2020-09-17 15:05:02,206 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:02,208 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:02,219 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 52 transitions. [2020-09-17 15:05:02,219 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:02,220 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:02,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:02,298 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:02,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:02,317 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85786#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:05:02,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:02,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:02,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:02,318 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 33 states. [2020-09-17 15:05:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:04,131 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2020-09-17 15:05:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 15:05:04,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:04,133 INFO L225 Difference]: With dead ends: 158 [2020-09-17 15:05:04,133 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 15:05:04,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1152, Invalid=2880, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 15:05:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 15:05:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 93. [2020-09-17 15:05:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 15:05:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 230 transitions. [2020-09-17 15:05:04,136 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 230 transitions. Word has length 36 [2020-09-17 15:05:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:04,136 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 230 transitions. [2020-09-17 15:05:04,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 230 transitions. [2020-09-17 15:05:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:04,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:04,137 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:04,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:04,337 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1259398744, now seen corresponding path program 197 times [2020-09-17 15:05:04,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:04,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680776287] [2020-09-17 15:05:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:05,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680776287] [2020-09-17 15:05:05,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266237735] [2020-09-17 15:05:05,375 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:05,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:05:05,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:05,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:05,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:05,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:05,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:05,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1087651428] [2020-09-17 15:05:05,489 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:05,491 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:05,502 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:05,502 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:05,502 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:05,503 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:05,581 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:05,582 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:05,599 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86330#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:05:05,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:05,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:05,601 INFO L87 Difference]: Start difference. First operand 93 states and 230 transitions. Second operand 33 states. [2020-09-17 15:05:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:07,553 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-17 15:05:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:05:07,554 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:07,555 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:05:07,555 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:05:07,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1158, Invalid=3132, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 15:05:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:05:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2020-09-17 15:05:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 15:05:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 236 transitions. [2020-09-17 15:05:07,559 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 236 transitions. Word has length 36 [2020-09-17 15:05:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:07,559 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 236 transitions. [2020-09-17 15:05:07,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 236 transitions. [2020-09-17 15:05:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:07,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:07,560 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:07,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 15:05:07,769 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1984584774, now seen corresponding path program 198 times [2020-09-17 15:05:07,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:07,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078315095] [2020-09-17 15:05:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:08,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078315095] [2020-09-17 15:05:08,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477005519] [2020-09-17 15:05:08,758 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:08,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:05:08,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:08,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:08,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:08,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390319543] [2020-09-17 15:05:08,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:08,869 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:08,881 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:08,882 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:08,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:08,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:08,980 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86879#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:05:08,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:08,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:08,981 INFO L87 Difference]: Start difference. First operand 95 states and 236 transitions. Second operand 33 states. [2020-09-17 15:05:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:11,120 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-17 15:05:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:05:11,121 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:11,122 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:05:11,122 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:05:11,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:05:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:05:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2020-09-17 15:05:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:05:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 242 transitions. [2020-09-17 15:05:11,125 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 242 transitions. Word has length 36 [2020-09-17 15:05:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:11,125 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 242 transitions. [2020-09-17 15:05:11,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 242 transitions. [2020-09-17 15:05:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:11,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:11,126 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:11,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 15:05:11,327 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -338800228, now seen corresponding path program 199 times [2020-09-17 15:05:11,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:11,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688367931] [2020-09-17 15:05:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:12,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688367931] [2020-09-17 15:05:12,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275100289] [2020-09-17 15:05:12,237 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:12,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:12,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:12,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [262714931] [2020-09-17 15:05:12,338 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:12,341 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:12,353 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:12,354 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:12,354 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:12,355 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:12,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:12,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:12,446 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87434#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:05:12,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:12,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:12,447 INFO L87 Difference]: Start difference. First operand 97 states and 242 transitions. Second operand 33 states. [2020-09-17 15:05:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:14,793 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-17 15:05:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:05:14,794 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:14,795 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:05:14,795 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:05:14,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1218, Invalid=3612, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:05:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:05:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 99. [2020-09-17 15:05:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:05:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 248 transitions. [2020-09-17 15:05:14,798 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 248 transitions. Word has length 36 [2020-09-17 15:05:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:14,798 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 248 transitions. [2020-09-17 15:05:14,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 248 transitions. [2020-09-17 15:05:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:14,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:14,798 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:14,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:14,999 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -962785282, now seen corresponding path program 200 times [2020-09-17 15:05:15,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:15,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716431092] [2020-09-17 15:05:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:15,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716431092] [2020-09-17 15:05:15,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365412959] [2020-09-17 15:05:15,911 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:15,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:05:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:16,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:16,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:16,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [397945973] [2020-09-17 15:05:16,014 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:16,016 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:16,026 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:16,027 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:16,027 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:16,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:16,105 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:16,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:16,123 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87995#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:05:16,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:16,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:16,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:16,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:16,125 INFO L87 Difference]: Start difference. First operand 99 states and 248 transitions. Second operand 33 states. [2020-09-17 15:05:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:18,647 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-17 15:05:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:05:18,649 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:18,650 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:05:18,650 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:05:18,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1272, Invalid=3840, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:05:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:05:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2020-09-17 15:05:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:05:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 254 transitions. [2020-09-17 15:05:18,654 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 254 transitions. Word has length 36 [2020-09-17 15:05:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:18,654 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 254 transitions. [2020-09-17 15:05:18,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 254 transitions. [2020-09-17 15:05:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:18,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:18,655 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:18,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 15:05:18,863 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:18,864 INFO L82 PathProgramCache]: Analyzing trace with hash 426508000, now seen corresponding path program 201 times [2020-09-17 15:05:18,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:18,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436153058] [2020-09-17 15:05:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:19,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436153058] [2020-09-17 15:05:19,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972695016] [2020-09-17 15:05:19,737 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:19,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:05:19,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:19,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:19,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:19,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419696920] [2020-09-17 15:05:19,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:19,869 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:19,880 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:19,880 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:19,881 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:19,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:19,956 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:19,956 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:19,974 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [88562#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:05:19,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:19,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:19,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:19,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:19,976 INFO L87 Difference]: Start difference. First operand 101 states and 254 transitions. Second operand 33 states. [2020-09-17 15:05:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:22,659 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-17 15:05:22,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:05:22,661 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:22,661 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:05:22,661 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:05:22,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1342, Invalid=4060, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:05:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:05:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2020-09-17 15:05:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:05:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 260 transitions. [2020-09-17 15:05:22,664 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 260 transitions. Word has length 36 [2020-09-17 15:05:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:22,664 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 260 transitions. [2020-09-17 15:05:22,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 260 transitions. [2020-09-17 15:05:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:22,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:22,665 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:22,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-17 15:05:22,870 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1871527490, now seen corresponding path program 202 times [2020-09-17 15:05:22,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:22,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004755974] [2020-09-17 15:05:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:23,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004755974] [2020-09-17 15:05:23,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065530817] [2020-09-17 15:05:23,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:23,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:05:23,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:23,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:23,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:23,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1925277749] [2020-09-17 15:05:23,835 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:23,838 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:23,847 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:23,848 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:23,848 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:23,848 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:23,925 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:23,925 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:23,945 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89135#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:05:23,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:23,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:23,946 INFO L87 Difference]: Start difference. First operand 103 states and 260 transitions. Second operand 33 states. [2020-09-17 15:05:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:26,779 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-17 15:05:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:05:26,781 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:26,781 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:05:26,781 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:05:26,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:05:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:05:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 105. [2020-09-17 15:05:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:05:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 266 transitions. [2020-09-17 15:05:26,785 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 266 transitions. Word has length 36 [2020-09-17 15:05:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:26,785 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 266 transitions. [2020-09-17 15:05:26,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 266 transitions. [2020-09-17 15:05:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:26,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:26,785 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:26,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 15:05:26,986 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1113255460, now seen corresponding path program 203 times [2020-09-17 15:05:26,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:26,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570745327] [2020-09-17 15:05:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:27,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570745327] [2020-09-17 15:05:27,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590440086] [2020-09-17 15:05:27,829 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:27,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:05:27,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:27,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:27,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:27,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:27,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [112388350] [2020-09-17 15:05:27,952 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:27,954 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:27,965 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:27,965 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:27,966 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:27,966 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:28,043 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:28,044 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:28,061 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89714#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:05:28,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:28,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:28,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:28,063 INFO L87 Difference]: Start difference. First operand 105 states and 266 transitions. Second operand 33 states. [2020-09-17 15:05:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:31,168 INFO L93 Difference]: Finished difference Result 143 states and 344 transitions. [2020-09-17 15:05:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:05:31,170 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:31,170 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:05:31,171 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:05:31,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1530, Invalid=4476, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:05:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:05:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-09-17 15:05:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:05:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 272 transitions. [2020-09-17 15:05:31,174 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 272 transitions. Word has length 36 [2020-09-17 15:05:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:31,174 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 272 transitions. [2020-09-17 15:05:31,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 272 transitions. [2020-09-17 15:05:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:31,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:31,174 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:31,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:31,375 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:31,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash -617140602, now seen corresponding path program 204 times [2020-09-17 15:05:31,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:31,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973241227] [2020-09-17 15:05:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:32,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973241227] [2020-09-17 15:05:32,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829761366] [2020-09-17 15:05:32,217 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:32,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-17 15:05:32,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:32,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:32,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:32,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [983517883] [2020-09-17 15:05:32,352 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:32,354 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:32,365 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:32,365 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:32,366 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:32,366 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:32,445 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:32,445 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:32,464 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90299#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:05:32,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:32,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:32,465 INFO L87 Difference]: Start difference. First operand 107 states and 272 transitions. Second operand 33 states. [2020-09-17 15:05:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:35,675 INFO L93 Difference]: Finished difference Result 141 states and 342 transitions. [2020-09-17 15:05:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:05:35,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:35,677 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:05:35,677 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:05:35,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1648, Invalid=4672, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:05:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:05:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-09-17 15:05:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:05:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 278 transitions. [2020-09-17 15:05:35,680 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 278 transitions. Word has length 36 [2020-09-17 15:05:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:35,681 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 278 transitions. [2020-09-17 15:05:35,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 278 transitions. [2020-09-17 15:05:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:35,681 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:35,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 15:05:35,882 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:35,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1249108120, now seen corresponding path program 205 times [2020-09-17 15:05:35,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:35,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781790708] [2020-09-17 15:05:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:36,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781790708] [2020-09-17 15:05:36,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090918336] [2020-09-17 15:05:36,716 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:36,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:36,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:36,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:36,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [212906468] [2020-09-17 15:05:36,838 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:36,841 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:36,851 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:36,851 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:36,852 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:36,852 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:36,926 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:36,927 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:36,945 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90890#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:05:36,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:36,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:36,946 INFO L87 Difference]: Start difference. First operand 109 states and 278 transitions. Second operand 33 states. [2020-09-17 15:05:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:40,266 INFO L93 Difference]: Finished difference Result 139 states and 340 transitions. [2020-09-17 15:05:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:05:40,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:40,268 INFO L225 Difference]: With dead ends: 139 [2020-09-17 15:05:40,268 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 15:05:40,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1782, Invalid=4860, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:05:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 15:05:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2020-09-17 15:05:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:05:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 284 transitions. [2020-09-17 15:05:40,271 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 284 transitions. Word has length 36 [2020-09-17 15:05:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:40,271 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 284 transitions. [2020-09-17 15:05:40,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 284 transitions. [2020-09-17 15:05:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:40,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:40,272 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:40,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:40,480 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1623974090, now seen corresponding path program 206 times [2020-09-17 15:05:40,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:40,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269068051] [2020-09-17 15:05:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:41,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269068051] [2020-09-17 15:05:41,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754280050] [2020-09-17 15:05:41,309 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:41,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:05:41,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:41,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:41,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:41,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:41,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1223621785] [2020-09-17 15:05:41,431 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:41,433 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:41,443 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:41,443 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:41,444 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:41,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:41,520 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:41,520 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:41,576 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [91487#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:05:41,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:41,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:41,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:41,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:41,577 INFO L87 Difference]: Start difference. First operand 111 states and 284 transitions. Second operand 33 states. [2020-09-17 15:05:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:45,121 INFO L93 Difference]: Finished difference Result 137 states and 338 transitions. [2020-09-17 15:05:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:05:45,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:45,123 INFO L225 Difference]: With dead ends: 137 [2020-09-17 15:05:45,123 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 15:05:45,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1932, Invalid=5040, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:05:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 15:05:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2020-09-17 15:05:45,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 15:05:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 290 transitions. [2020-09-17 15:05:45,129 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 290 transitions. Word has length 36 [2020-09-17 15:05:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:45,129 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 290 transitions. [2020-09-17 15:05:45,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 290 transitions. [2020-09-17 15:05:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:45,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:45,130 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:45,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:45,331 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash -495938900, now seen corresponding path program 207 times [2020-09-17 15:05:45,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:45,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697617366] [2020-09-17 15:05:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:46,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697617366] [2020-09-17 15:05:46,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477147252] [2020-09-17 15:05:46,179 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:46,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-17 15:05:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:46,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:46,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:46,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [729385566] [2020-09-17 15:05:46,315 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:46,317 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:46,329 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:46,329 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:46,331 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:46,331 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:46,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:46,410 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:46,428 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92090#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:05:46,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:46,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:46,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:46,429 INFO L87 Difference]: Start difference. First operand 113 states and 290 transitions. Second operand 33 states. [2020-09-17 15:05:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:50,204 INFO L93 Difference]: Finished difference Result 135 states and 336 transitions. [2020-09-17 15:05:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:05:50,205 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:50,206 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:05:50,206 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:05:50,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2098, Invalid=5212, Unknown=0, NotChecked=0, Total=7310 [2020-09-17 15:05:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:05:50,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2020-09-17 15:05:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 15:05:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 296 transitions. [2020-09-17 15:05:50,209 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 296 transitions. Word has length 36 [2020-09-17 15:05:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:50,210 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 296 transitions. [2020-09-17 15:05:50,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 296 transitions. [2020-09-17 15:05:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:50,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:50,210 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:50,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2020-09-17 15:05:50,411 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1745070834, now seen corresponding path program 208 times [2020-09-17 15:05:50,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:50,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975718340] [2020-09-17 15:05:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:51,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975718340] [2020-09-17 15:05:51,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359693682] [2020-09-17 15:05:51,290 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:51,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:05:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:51,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1950180462] [2020-09-17 15:05:51,420 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:51,423 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:51,433 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:51,434 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:51,434 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:51,434 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:51,513 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:51,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:51,532 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92699#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-17 15:05:51,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:51,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:51,533 INFO L87 Difference]: Start difference. First operand 115 states and 296 transitions. Second operand 33 states. [2020-09-17 15:05:55,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:05:55,381 INFO L93 Difference]: Finished difference Result 135 states and 339 transitions. [2020-09-17 15:05:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:05:55,383 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:05:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:05:55,384 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:05:55,384 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:05:55,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2280, Invalid=5376, Unknown=0, NotChecked=0, Total=7656 [2020-09-17 15:05:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:05:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-09-17 15:05:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 15:05:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 304 transitions. [2020-09-17 15:05:55,387 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 304 transitions. Word has length 36 [2020-09-17 15:05:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:05:55,387 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 304 transitions. [2020-09-17 15:05:55,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:05:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 304 transitions. [2020-09-17 15:05:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-17 15:05:55,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:05:55,388 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:05:55,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:55,589 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:05:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:05:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1728493584, now seen corresponding path program 209 times [2020-09-17 15:05:55,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:05:55,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863629948] [2020-09-17 15:05:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:05:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:05:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:56,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863629948] [2020-09-17 15:05:56,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798513765] [2020-09-17 15:05:56,476 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:05:56,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-17 15:05:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:05:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-17 15:05:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:05:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:05:56,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:05:56,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-17 15:05:56,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1662465919] [2020-09-17 15:05:56,610 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:05:56,612 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:05:56,623 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-17 15:05:56,623 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:05:56,625 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:56,625 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:56,702 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:05:56,702 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:05:56,719 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93316#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-17 15:05:56,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-17 15:05:56,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:05:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-17 15:05:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 15:05:56,720 INFO L87 Difference]: Start difference. First operand 117 states and 304 transitions. Second operand 33 states. [2020-09-17 15:06:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:00,782 INFO L93 Difference]: Finished difference Result 135 states and 347 transitions. [2020-09-17 15:06:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-17 15:06:00,784 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-17 15:06:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:00,784 INFO L225 Difference]: With dead ends: 135 [2020-09-17 15:06:00,784 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 15:06:00,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2476, Invalid=5534, Unknown=0, NotChecked=0, Total=8010 [2020-09-17 15:06:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 15:06:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2020-09-17 15:06:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 15:06:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-17 15:06:00,787 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 36 [2020-09-17 15:06:00,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:00,787 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-17 15:06:00,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-17 15:06:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-17 15:06:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:00,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:00,788 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 15:06:00,989 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1876764150, now seen corresponding path program 210 times [2020-09-17 15:06:00,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620183157] [2020-09-17 15:06:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:02,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620183157] [2020-09-17 15:06:02,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624096167] [2020-09-17 15:06:02,175 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:02,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:06:02,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:02,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:02,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:02,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:02,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:02,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134959333] [2020-09-17 15:06:02,276 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:02,278 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:02,289 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 57 transitions. [2020-09-17 15:06:02,289 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:02,290 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,290 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,357 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,358 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,420 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,421 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,432 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,453 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,522 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:02,523 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:02,535 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93879#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 15:06:02,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:02,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:02,537 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 34 states. [2020-09-17 15:06:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:04,473 INFO L93 Difference]: Finished difference Result 132 states and 308 transitions. [2020-09-17 15:06:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:06:04,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:04,476 INFO L225 Difference]: With dead ends: 132 [2020-09-17 15:06:04,476 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 15:06:04,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1232, Invalid=2928, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 15:06:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 15:06:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-17 15:06:04,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 15:06:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-17 15:06:04,479 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 37 [2020-09-17 15:06:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:04,480 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-17 15:06:04,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-17 15:06:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:04,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:04,480 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:04,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 15:06:04,681 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1233524332, now seen corresponding path program 211 times [2020-09-17 15:06:04,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:04,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906906278] [2020-09-17 15:06:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:05,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906906278] [2020-09-17 15:06:05,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882541876] [2020-09-17 15:06:05,849 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:05,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:05,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:05,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [463043774] [2020-09-17 15:06:05,950 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:05,952 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:05,963 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:05,963 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:05,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:05,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:06,048 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:06,049 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:06,066 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94403#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 15:06:06,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:06,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:06,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:06,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:06,068 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 34 states. [2020-09-17 15:06:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:08,332 INFO L93 Difference]: Finished difference Result 192 states and 430 transitions. [2020-09-17 15:06:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:06:08,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:08,334 INFO L225 Difference]: With dead ends: 192 [2020-09-17 15:06:08,334 INFO L226 Difference]: Without dead ends: 186 [2020-09-17 15:06:08,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1301, Invalid=3391, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:06:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-17 15:06:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 96. [2020-09-17 15:06:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 15:06:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-17 15:06:08,336 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 37 [2020-09-17 15:06:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:08,336 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-17 15:06:08,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-17 15:06:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:08,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:08,337 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:08,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:08,539 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:08,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1911620430, now seen corresponding path program 212 times [2020-09-17 15:06:08,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:08,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349630632] [2020-09-17 15:06:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:09,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349630632] [2020-09-17 15:06:09,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249283102] [2020-09-17 15:06:09,694 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:09,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:06:09,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:09,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [648555757] [2020-09-17 15:06:09,797 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:09,800 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:09,814 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:09,814 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:09,823 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:09,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:09,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:09,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:09,921 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94999#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:06:09,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:09,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:09,922 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 34 states. [2020-09-17 15:06:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:12,377 INFO L93 Difference]: Finished difference Result 189 states and 426 transitions. [2020-09-17 15:06:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:06:12,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:12,379 INFO L225 Difference]: With dead ends: 189 [2020-09-17 15:06:12,380 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 15:06:12,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1320, Invalid=3650, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 15:06:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 15:06:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 98. [2020-09-17 15:06:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:06:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 244 transitions. [2020-09-17 15:06:12,383 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 244 transitions. Word has length 37 [2020-09-17 15:06:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:12,383 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 244 transitions. [2020-09-17 15:06:12,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 244 transitions. [2020-09-17 15:06:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:12,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:12,383 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:12,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 15:06:12,584 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1332363088, now seen corresponding path program 213 times [2020-09-17 15:06:12,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:12,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002714859] [2020-09-17 15:06:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:13,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002714859] [2020-09-17 15:06:13,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508532889] [2020-09-17 15:06:13,664 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:13,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:06:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:13,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:13,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:13,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:13,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [934394631] [2020-09-17 15:06:13,779 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:13,783 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:13,795 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:13,795 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:13,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:13,796 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:13,878 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:13,879 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:13,897 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95600#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:06:13,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:13,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:13,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:13,898 INFO L87 Difference]: Start difference. First operand 98 states and 244 transitions. Second operand 34 states. [2020-09-17 15:06:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:16,389 INFO L93 Difference]: Finished difference Result 187 states and 424 transitions. [2020-09-17 15:06:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:06:16,391 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:16,392 INFO L225 Difference]: With dead ends: 187 [2020-09-17 15:06:16,392 INFO L226 Difference]: Without dead ends: 181 [2020-09-17 15:06:16,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1355, Invalid=3901, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:06:16,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-17 15:06:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 100. [2020-09-17 15:06:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:06:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 250 transitions. [2020-09-17 15:06:16,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 250 transitions. Word has length 37 [2020-09-17 15:06:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:16,395 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 250 transitions. [2020-09-17 15:06:16,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 250 transitions. [2020-09-17 15:06:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:16,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:16,396 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:16,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:16,598 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 313421458, now seen corresponding path program 214 times [2020-09-17 15:06:16,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:16,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526493289] [2020-09-17 15:06:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:17,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526493289] [2020-09-17 15:06:17,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995951058] [2020-09-17 15:06:17,654 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:17,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:06:17,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:17,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:17,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:17,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:17,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:17,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2029682744] [2020-09-17 15:06:17,763 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:17,765 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:17,775 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:17,775 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:17,776 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:17,776 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:17,860 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:17,860 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:17,879 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:06:17,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:17,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:17,880 INFO L87 Difference]: Start difference. First operand 100 states and 250 transitions. Second operand 34 states. [2020-09-17 15:06:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:20,664 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2020-09-17 15:06:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:06:20,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:20,666 INFO L225 Difference]: With dead ends: 185 [2020-09-17 15:06:20,667 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 15:06:20,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1406, Invalid=4144, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:06:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 15:06:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2020-09-17 15:06:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:06:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 256 transitions. [2020-09-17 15:06:20,669 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 256 transitions. Word has length 37 [2020-09-17 15:06:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:20,670 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 256 transitions. [2020-09-17 15:06:20,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 256 transitions. [2020-09-17 15:06:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:20,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:20,670 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:20,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 15:06:20,871 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -310563596, now seen corresponding path program 215 times [2020-09-17 15:06:20,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:20,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548940254] [2020-09-17 15:06:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:21,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548940254] [2020-09-17 15:06:21,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908799901] [2020-09-17 15:06:21,921 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:22,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:06:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:22,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:22,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:22,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2098781159] [2020-09-17 15:06:22,041 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:22,044 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:22,054 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:22,055 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:22,055 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:22,055 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:22,142 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:22,143 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:22,161 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96820#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:06:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:22,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:22,162 INFO L87 Difference]: Start difference. First operand 102 states and 256 transitions. Second operand 34 states. [2020-09-17 15:06:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:25,093 INFO L93 Difference]: Finished difference Result 183 states and 420 transitions. [2020-09-17 15:06:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:06:25,095 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:25,095 INFO L225 Difference]: With dead ends: 183 [2020-09-17 15:06:25,095 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 15:06:25,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1473, Invalid=4379, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:06:25,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 15:06:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2020-09-17 15:06:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:06:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 262 transitions. [2020-09-17 15:06:25,099 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 262 transitions. Word has length 37 [2020-09-17 15:06:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:25,099 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 262 transitions. [2020-09-17 15:06:25,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 262 transitions. [2020-09-17 15:06:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:25,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:25,100 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:25,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:25,308 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1078729686, now seen corresponding path program 216 times [2020-09-17 15:06:25,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:25,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532683210] [2020-09-17 15:06:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:26,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532683210] [2020-09-17 15:06:26,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664497810] [2020-09-17 15:06:26,332 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:26,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:06:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:26,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:26,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:26,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1112764878] [2020-09-17 15:06:26,456 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:26,460 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:26,471 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:26,471 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:26,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:26,472 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:26,554 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:26,554 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:26,572 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [97439#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:06:26,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:26,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:26,573 INFO L87 Difference]: Start difference. First operand 104 states and 262 transitions. Second operand 34 states. [2020-09-17 15:06:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:29,717 INFO L93 Difference]: Finished difference Result 181 states and 418 transitions. [2020-09-17 15:06:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:06:29,719 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:29,720 INFO L225 Difference]: With dead ends: 181 [2020-09-17 15:06:29,720 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 15:06:29,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1556, Invalid=4606, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:06:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 15:06:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 106. [2020-09-17 15:06:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:06:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 268 transitions. [2020-09-17 15:06:29,723 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 268 transitions. Word has length 37 [2020-09-17 15:06:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:29,723 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 268 transitions. [2020-09-17 15:06:29,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 268 transitions. [2020-09-17 15:06:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:29,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:29,723 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:29,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 15:06:29,924 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1771218120, now seen corresponding path program 217 times [2020-09-17 15:06:29,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:29,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368191922] [2020-09-17 15:06:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:30,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368191922] [2020-09-17 15:06:30,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968813087] [2020-09-17 15:06:30,907 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:31,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:31,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:31,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1715448545] [2020-09-17 15:06:31,020 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:31,023 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:31,034 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:31,035 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:31,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:31,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:31,127 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:31,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:31,147 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98064#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:06:31,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:31,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:31,149 INFO L87 Difference]: Start difference. First operand 106 states and 268 transitions. Second operand 34 states. [2020-09-17 15:06:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:34,532 INFO L93 Difference]: Finished difference Result 179 states and 416 transitions. [2020-09-17 15:06:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:06:34,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:34,535 INFO L225 Difference]: With dead ends: 179 [2020-09-17 15:06:34,535 INFO L226 Difference]: Without dead ends: 173 [2020-09-17 15:06:34,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1655, Invalid=4825, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:06:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-17 15:06:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 108. [2020-09-17 15:06:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:06:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 274 transitions. [2020-09-17 15:06:34,538 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 274 transitions. Word has length 37 [2020-09-17 15:06:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:34,538 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 274 transitions. [2020-09-17 15:06:34,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 274 transitions. [2020-09-17 15:06:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:34,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:34,539 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:34,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2020-09-17 15:06:34,739 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1765477146, now seen corresponding path program 218 times [2020-09-17 15:06:34,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:34,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875525700] [2020-09-17 15:06:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:35,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875525700] [2020-09-17 15:06:35,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010541898] [2020-09-17 15:06:35,747 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:35,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:06:35,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:35,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:35,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:35,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1512355708] [2020-09-17 15:06:35,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:35,869 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:35,880 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:35,881 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:35,884 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:35,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:35,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:35,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:35,990 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98695#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:06:35,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:35,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:35,991 INFO L87 Difference]: Start difference. First operand 108 states and 274 transitions. Second operand 34 states. [2020-09-17 15:06:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:39,533 INFO L93 Difference]: Finished difference Result 177 states and 414 transitions. [2020-09-17 15:06:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:06:39,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:39,535 INFO L225 Difference]: With dead ends: 177 [2020-09-17 15:06:39,536 INFO L226 Difference]: Without dead ends: 171 [2020-09-17 15:06:39,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1770, Invalid=5036, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:06:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-17 15:06:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2020-09-17 15:06:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:06:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 280 transitions. [2020-09-17 15:06:39,539 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 280 transitions. Word has length 37 [2020-09-17 15:06:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:39,539 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 280 transitions. [2020-09-17 15:06:39,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 280 transitions. [2020-09-17 15:06:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:39,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:39,540 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:39,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:39,741 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash 35081084, now seen corresponding path program 219 times [2020-09-17 15:06:39,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:39,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148327840] [2020-09-17 15:06:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:40,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148327840] [2020-09-17 15:06:40,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508429508] [2020-09-17 15:06:40,760 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:40,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:06:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:40,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:40,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:40,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [659057146] [2020-09-17 15:06:40,892 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:40,894 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:40,905 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:40,905 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:40,909 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:40,909 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:41,001 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:41,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:41,019 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:06:41,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:41,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:41,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:41,020 INFO L87 Difference]: Start difference. First operand 110 states and 280 transitions. Second operand 34 states. [2020-09-17 15:06:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:44,789 INFO L93 Difference]: Finished difference Result 175 states and 412 transitions. [2020-09-17 15:06:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:06:44,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:44,792 INFO L225 Difference]: With dead ends: 175 [2020-09-17 15:06:44,792 INFO L226 Difference]: Without dead ends: 169 [2020-09-17 15:06:44,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1901, Invalid=5239, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:06:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-17 15:06:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2020-09-17 15:06:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:06:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 286 transitions. [2020-09-17 15:06:44,795 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 286 transitions. Word has length 37 [2020-09-17 15:06:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:44,796 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 286 transitions. [2020-09-17 15:06:44,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 286 transitions. [2020-09-17 15:06:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:44,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:44,796 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:44,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2020-09-17 15:06:44,997 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash -596886434, now seen corresponding path program 220 times [2020-09-17 15:06:44,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:44,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644546309] [2020-09-17 15:06:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:46,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644546309] [2020-09-17 15:06:46,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136564342] [2020-09-17 15:06:46,006 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:46,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:06:46,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:46,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:46,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:46,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600437580] [2020-09-17 15:06:46,132 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:46,134 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:46,163 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:46,163 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:46,164 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:46,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:46,248 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:46,248 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:46,267 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99975#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:06:46,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:46,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:46,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:46,268 INFO L87 Difference]: Start difference. First operand 112 states and 286 transitions. Second operand 34 states. [2020-09-17 15:06:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:50,330 INFO L93 Difference]: Finished difference Result 173 states and 410 transitions. [2020-09-17 15:06:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:06:50,332 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:50,333 INFO L225 Difference]: With dead ends: 173 [2020-09-17 15:06:50,333 INFO L226 Difference]: Without dead ends: 167 [2020-09-17 15:06:50,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2048, Invalid=5434, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:06:50,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-17 15:06:50,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-09-17 15:06:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:06:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 292 transitions. [2020-09-17 15:06:50,337 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 292 transitions. Word has length 37 [2020-09-17 15:06:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:50,337 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 292 transitions. [2020-09-17 15:06:50,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 292 transitions. [2020-09-17 15:06:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:50,337 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:50,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 15:06:50,538 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2018771520, now seen corresponding path program 221 times [2020-09-17 15:06:50,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:50,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114585884] [2020-09-17 15:06:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:51,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114585884] [2020-09-17 15:06:51,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000978735] [2020-09-17 15:06:51,554 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:51,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:06:51,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:51,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:51,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [145775668] [2020-09-17 15:06:51,692 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:51,694 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:51,706 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:51,706 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:51,706 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:51,707 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:51,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:51,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:51,814 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [100624#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:06:51,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:51,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:51,815 INFO L87 Difference]: Start difference. First operand 114 states and 292 transitions. Second operand 34 states. [2020-09-17 15:06:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:06:56,020 INFO L93 Difference]: Finished difference Result 171 states and 408 transitions. [2020-09-17 15:06:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:06:56,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:06:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:06:56,023 INFO L225 Difference]: With dead ends: 171 [2020-09-17 15:06:56,023 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 15:06:56,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2211, Invalid=5621, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:06:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 15:06:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2020-09-17 15:06:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 15:06:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 298 transitions. [2020-09-17 15:06:56,026 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 298 transitions. Word has length 37 [2020-09-17 15:06:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:06:56,027 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 298 transitions. [2020-09-17 15:06:56,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:06:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 298 transitions. [2020-09-17 15:06:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:06:56,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:06:56,027 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:06:56,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:56,237 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:06:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:06:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash 156282786, now seen corresponding path program 222 times [2020-09-17 15:06:56,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:06:56,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668871271] [2020-09-17 15:06:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:06:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:06:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:57,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668871271] [2020-09-17 15:06:57,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559628680] [2020-09-17 15:06:57,284 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:06:57,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:06:57,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:06:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:06:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:06:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:06:57,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:06:57,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:06:57,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471361460] [2020-09-17 15:06:57,431 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:06:57,434 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:06:57,446 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:06:57,446 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:06:57,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:57,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:57,547 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:06:57,547 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:06:57,568 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101279#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:06:57,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:06:57,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:06:57,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:06:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:06:57,570 INFO L87 Difference]: Start difference. First operand 116 states and 298 transitions. Second operand 34 states. [2020-09-17 15:07:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:01,983 INFO L93 Difference]: Finished difference Result 169 states and 406 transitions. [2020-09-17 15:07:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:07:01,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:07:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:01,986 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:07:01,986 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:07:01,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2390, Invalid=5800, Unknown=0, NotChecked=0, Total=8190 [2020-09-17 15:07:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:07:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-17 15:07:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 15:07:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 304 transitions. [2020-09-17 15:07:01,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 304 transitions. Word has length 37 [2020-09-17 15:07:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:01,989 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 304 transitions. [2020-09-17 15:07:01,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:07:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 304 transitions. [2020-09-17 15:07:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:07:01,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:01,990 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:02,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 15:07:02,200 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1092849148, now seen corresponding path program 223 times [2020-09-17 15:07:02,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:02,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808068577] [2020-09-17 15:07:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808068577] [2020-09-17 15:07:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814489111] [2020-09-17 15:07:03,282 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:03,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:07:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:03,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:03,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:07:03,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1779712063] [2020-09-17 15:07:03,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:03,419 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:03,430 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:07:03,430 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:03,430 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:03,431 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:03,517 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:03,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:03,536 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101940#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:07:03,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:07:03,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:03,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:07:03,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:07:03,537 INFO L87 Difference]: Start difference. First operand 118 states and 304 transitions. Second operand 34 states. [2020-09-17 15:07:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:08,237 INFO L93 Difference]: Finished difference Result 169 states and 409 transitions. [2020-09-17 15:07:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-17 15:07:08,239 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:07:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:08,239 INFO L225 Difference]: With dead ends: 169 [2020-09-17 15:07:08,240 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 15:07:08,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2585, Invalid=5971, Unknown=0, NotChecked=0, Total=8556 [2020-09-17 15:07:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 15:07:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2020-09-17 15:07:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 15:07:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2020-09-17 15:07:08,242 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 37 [2020-09-17 15:07:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:08,243 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2020-09-17 15:07:08,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:07:08,243 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2020-09-17 15:07:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-17 15:07:08,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:08,243 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:08,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-17 15:07:08,444 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1076271898, now seen corresponding path program 224 times [2020-09-17 15:07:08,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:08,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293647044] [2020-09-17 15:07:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:09,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293647044] [2020-09-17 15:07:09,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663191879] [2020-09-17 15:07:09,437 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:09,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:07:09,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-17 15:07:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:09,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:09,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-17 15:07:09,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [908046797] [2020-09-17 15:07:09,574 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:09,576 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:09,588 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-17 15:07:09,588 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:09,592 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:09,592 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:09,677 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:09,677 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:09,693 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [102609#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-17 15:07:09,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 15:07:09,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 15:07:09,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 15:07:09,694 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand 34 states. [2020-09-17 15:07:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:14,411 INFO L93 Difference]: Finished difference Result 170 states and 419 transitions. [2020-09-17 15:07:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-17 15:07:14,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-17 15:07:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:14,414 INFO L225 Difference]: With dead ends: 170 [2020-09-17 15:07:14,414 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 15:07:14,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2794, Invalid=6136, Unknown=0, NotChecked=0, Total=8930 [2020-09-17 15:07:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 15:07:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-17 15:07:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:07:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-09-17 15:07:14,418 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2020-09-17 15:07:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:14,418 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-09-17 15:07:14,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 15:07:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-09-17 15:07:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:14,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:14,418 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:14,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 15:07:14,619 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash 286110261, now seen corresponding path program 225 times [2020-09-17 15:07:14,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:14,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387011455] [2020-09-17 15:07:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:16,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387011455] [2020-09-17 15:07:16,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759767364] [2020-09-17 15:07:16,044 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:16,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:07:16,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:16,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:16,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:16,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462821437] [2020-09-17 15:07:16,153 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:16,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:16,167 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 54 transitions. [2020-09-17 15:07:16,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:16,173 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:16,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:16,272 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:16,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:16,293 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103227#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:07:16,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:16,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:16,294 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 35 states. [2020-09-17 15:07:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:18,628 INFO L93 Difference]: Finished difference Result 166 states and 378 transitions. [2020-09-17 15:07:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 15:07:18,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:18,631 INFO L225 Difference]: With dead ends: 166 [2020-09-17 15:07:18,631 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 15:07:18,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 15:07:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 15:07:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2020-09-17 15:07:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 15:07:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 240 transitions. [2020-09-17 15:07:18,634 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 240 transitions. Word has length 38 [2020-09-17 15:07:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:18,634 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 240 transitions. [2020-09-17 15:07:18,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 240 transitions. [2020-09-17 15:07:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:18,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:18,635 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:18,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:18,837 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash -898568553, now seen corresponding path program 226 times [2020-09-17 15:07:18,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:18,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510861586] [2020-09-17 15:07:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:20,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510861586] [2020-09-17 15:07:20,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081655463] [2020-09-17 15:07:20,185 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:20,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:07:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:20,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:20,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:20,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:20,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [21295241] [2020-09-17 15:07:20,287 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:20,289 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:20,325 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:20,326 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:20,328 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:20,328 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:20,424 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:20,425 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:20,444 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103799#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:07:20,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:20,445 INFO L87 Difference]: Start difference. First operand 97 states and 240 transitions. Second operand 35 states. [2020-09-17 15:07:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:23,117 INFO L93 Difference]: Finished difference Result 163 states and 374 transitions. [2020-09-17 15:07:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:07:23,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:23,120 INFO L225 Difference]: With dead ends: 163 [2020-09-17 15:07:23,120 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 15:07:23,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1311, Invalid=3519, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 15:07:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 15:07:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 99. [2020-09-17 15:07:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 15:07:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 246 transitions. [2020-09-17 15:07:23,122 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 246 transitions. Word has length 38 [2020-09-17 15:07:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:23,122 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 246 transitions. [2020-09-17 15:07:23,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 246 transitions. [2020-09-17 15:07:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:23,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:23,123 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:23,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 15:07:23,325 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash -220472455, now seen corresponding path program 227 times [2020-09-17 15:07:23,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:23,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772595254] [2020-09-17 15:07:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:24,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772595254] [2020-09-17 15:07:24,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414385655] [2020-09-17 15:07:24,589 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:24,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:07:24,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:24,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:24,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:24,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:24,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:24,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1921811627] [2020-09-17 15:07:24,702 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:24,704 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:24,717 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:24,717 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:24,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:24,720 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:24,819 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:24,819 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:24,839 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104376#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:07:24,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:24,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:24,840 INFO L87 Difference]: Start difference. First operand 99 states and 246 transitions. Second operand 35 states. [2020-09-17 15:07:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:27,536 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-17 15:07:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:07:27,538 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:27,539 INFO L225 Difference]: With dead ends: 161 [2020-09-17 15:07:27,539 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 15:07:27,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 15:07:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 15:07:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2020-09-17 15:07:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 15:07:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 252 transitions. [2020-09-17 15:07:27,542 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 252 transitions. Word has length 38 [2020-09-17 15:07:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:27,543 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 252 transitions. [2020-09-17 15:07:27,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 252 transitions. [2020-09-17 15:07:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:27,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:27,543 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:27,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-17 15:07:27,744 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:27,744 INFO L82 PathProgramCache]: Analyzing trace with hash 830511323, now seen corresponding path program 228 times [2020-09-17 15:07:27,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:27,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071266134] [2020-09-17 15:07:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:29,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071266134] [2020-09-17 15:07:29,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317639271] [2020-09-17 15:07:29,020 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:29,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:07:29,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:29,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:29,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:29,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [60856058] [2020-09-17 15:07:29,139 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:29,141 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:29,152 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:29,152 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:29,155 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:29,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:29,258 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:29,258 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:29,277 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104959#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:07:29,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:29,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:29,278 INFO L87 Difference]: Start difference. First operand 101 states and 252 transitions. Second operand 35 states. [2020-09-17 15:07:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:32,348 INFO L93 Difference]: Finished difference Result 159 states and 370 transitions. [2020-09-17 15:07:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:07:32,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:32,351 INFO L225 Difference]: With dead ends: 159 [2020-09-17 15:07:32,351 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 15:07:32,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1367, Invalid=4035, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 15:07:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 15:07:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 103. [2020-09-17 15:07:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 15:07:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 258 transitions. [2020-09-17 15:07:32,354 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 258 transitions. Word has length 38 [2020-09-17 15:07:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:32,354 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 258 transitions. [2020-09-17 15:07:32,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 258 transitions. [2020-09-17 15:07:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:32,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:32,355 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:32,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:32,556 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1818671427, now seen corresponding path program 229 times [2020-09-17 15:07:32,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:32,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189549904] [2020-09-17 15:07:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:33,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189549904] [2020-09-17 15:07:33,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8950406] [2020-09-17 15:07:33,793 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:33,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:33,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:33,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1826301062] [2020-09-17 15:07:33,905 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:33,907 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:33,919 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:33,919 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:33,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:33,922 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:34,016 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:34,016 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:34,035 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [105548#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:07:34,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:34,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:34,035 INFO L87 Difference]: Start difference. First operand 103 states and 258 transitions. Second operand 35 states. [2020-09-17 15:07:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:37,400 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-17 15:07:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:07:37,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:37,403 INFO L225 Difference]: With dead ends: 157 [2020-09-17 15:07:37,403 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 15:07:37,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1419, Invalid=4281, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 15:07:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 15:07:37,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2020-09-17 15:07:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 15:07:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 264 transitions. [2020-09-17 15:07:37,406 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 264 transitions. Word has length 38 [2020-09-17 15:07:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:37,406 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 264 transitions. [2020-09-17 15:07:37,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 264 transitions. [2020-09-17 15:07:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:37,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:37,406 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:37,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:37,607 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1852310815, now seen corresponding path program 230 times [2020-09-17 15:07:37,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:37,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420861404] [2020-09-17 15:07:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:38,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420861404] [2020-09-17 15:07:38,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517494760] [2020-09-17 15:07:38,809 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:38,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:07:38,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:38,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:38,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:38,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1943511544] [2020-09-17 15:07:38,924 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:38,927 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:38,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:38,938 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:38,939 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:38,939 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:39,036 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:39,037 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:39,058 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106143#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:07:39,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:39,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:39,059 INFO L87 Difference]: Start difference. First operand 105 states and 264 transitions. Second operand 35 states. [2020-09-17 15:07:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:42,637 INFO L93 Difference]: Finished difference Result 155 states and 366 transitions. [2020-09-17 15:07:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:07:42,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:42,640 INFO L225 Difference]: With dead ends: 155 [2020-09-17 15:07:42,640 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 15:07:42,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1487, Invalid=4519, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 15:07:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 15:07:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 107. [2020-09-17 15:07:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 15:07:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 270 transitions. [2020-09-17 15:07:42,644 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 270 transitions. Word has length 38 [2020-09-17 15:07:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:42,644 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 270 transitions. [2020-09-17 15:07:42,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 270 transitions. [2020-09-17 15:07:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:42,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:42,645 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:42,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:42,845 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1053363199, now seen corresponding path program 231 times [2020-09-17 15:07:42,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:42,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444908307] [2020-09-17 15:07:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:43,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444908307] [2020-09-17 15:07:43,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989348234] [2020-09-17 15:07:43,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:44,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:07:44,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:44,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:44,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:44,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1130669197] [2020-09-17 15:07:44,076 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:44,078 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:44,089 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:44,089 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:44,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:44,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:44,181 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:44,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:44,200 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106744#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:07:44,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:44,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:44,201 INFO L87 Difference]: Start difference. First operand 107 states and 270 transitions. Second operand 35 states. [2020-09-17 15:07:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:47,859 INFO L93 Difference]: Finished difference Result 153 states and 364 transitions. [2020-09-17 15:07:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:07:47,861 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:47,862 INFO L225 Difference]: With dead ends: 153 [2020-09-17 15:07:47,862 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 15:07:47,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 15:07:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 15:07:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2020-09-17 15:07:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 15:07:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 276 transitions. [2020-09-17 15:07:47,865 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 276 transitions. Word has length 38 [2020-09-17 15:07:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:47,865 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 276 transitions. [2020-09-17 15:07:47,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 276 transitions. [2020-09-17 15:07:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:47,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:47,866 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:48,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 15:07:48,067 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash 391656291, now seen corresponding path program 232 times [2020-09-17 15:07:48,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:48,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515398688] [2020-09-17 15:07:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:49,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515398688] [2020-09-17 15:07:49,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497651851] [2020-09-17 15:07:49,240 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:49,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:07:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:49,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:49,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:49,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809809300] [2020-09-17 15:07:49,356 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:49,359 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:49,370 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:49,370 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:49,372 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:49,373 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:49,466 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:49,466 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:49,486 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107351#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:07:49,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:49,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:49,487 INFO L87 Difference]: Start difference. First operand 109 states and 276 transitions. Second operand 35 states. [2020-09-17 15:07:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:53,368 INFO L93 Difference]: Finished difference Result 151 states and 362 transitions. [2020-09-17 15:07:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:07:53,370 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:53,371 INFO L225 Difference]: With dead ends: 151 [2020-09-17 15:07:53,371 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 15:07:53,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1671, Invalid=4971, Unknown=0, NotChecked=0, Total=6642 [2020-09-17 15:07:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 15:07:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2020-09-17 15:07:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 15:07:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 282 transitions. [2020-09-17 15:07:53,374 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 282 transitions. Word has length 38 [2020-09-17 15:07:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:53,374 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 282 transitions. [2020-09-17 15:07:53,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 282 transitions. [2020-09-17 15:07:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:53,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:53,375 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:53,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-17 15:07:53,576 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash -366615739, now seen corresponding path program 233 times [2020-09-17 15:07:53,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:53,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291028527] [2020-09-17 15:07:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:07:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:54,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291028527] [2020-09-17 15:07:54,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616112976] [2020-09-17 15:07:54,785 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:07:54,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:07:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:07:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:07:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:07:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:07:54,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:07:54,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:07:54,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1624579500] [2020-09-17 15:07:54,919 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:07:54,921 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:07:54,934 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:07:54,935 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:07:54,937 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:54,937 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:55,036 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:07:55,036 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:07:55,057 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107964#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:07:55,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:07:55,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:07:55,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:07:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:07:55,058 INFO L87 Difference]: Start difference. First operand 111 states and 282 transitions. Second operand 35 states. [2020-09-17 15:07:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:07:59,206 INFO L93 Difference]: Finished difference Result 149 states and 360 transitions. [2020-09-17 15:07:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:07:59,208 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:07:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:07:59,209 INFO L225 Difference]: With dead ends: 149 [2020-09-17 15:07:59,209 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 15:07:59,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1787, Invalid=5185, Unknown=0, NotChecked=0, Total=6972 [2020-09-17 15:07:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 15:07:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-09-17 15:07:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-17 15:07:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2020-09-17 15:07:59,212 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 38 [2020-09-17 15:07:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:07:59,212 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2020-09-17 15:07:59,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:07:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2020-09-17 15:07:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:07:59,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:07:59,213 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:07:59,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 15:07:59,414 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:07:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:07:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2097011801, now seen corresponding path program 234 times [2020-09-17 15:07:59,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:07:59,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577913747] [2020-09-17 15:07:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:07:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:00,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577913747] [2020-09-17 15:08:00,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302327268] [2020-09-17 15:08:00,559 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:00,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 15:08:00,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:00,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:00,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:00,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:00,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1520970918] [2020-09-17 15:08:00,696 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:00,698 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:00,709 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:00,709 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:00,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:00,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:00,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:00,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:00,830 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [108583#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:08:00,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:00,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:00,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:00,831 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand 35 states. [2020-09-17 15:08:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:05,193 INFO L93 Difference]: Finished difference Result 147 states and 358 transitions. [2020-09-17 15:08:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:08:05,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:05,196 INFO L225 Difference]: With dead ends: 147 [2020-09-17 15:08:05,197 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 15:08:05,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1919, Invalid=5391, Unknown=0, NotChecked=0, Total=7310 [2020-09-17 15:08:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 15:08:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2020-09-17 15:08:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-17 15:08:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 294 transitions. [2020-09-17 15:08:05,199 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 294 transitions. Word has length 38 [2020-09-17 15:08:05,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:05,199 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 294 transitions. [2020-09-17 15:08:05,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 294 transitions. [2020-09-17 15:08:05,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:08:05,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:05,200 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:05,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 15:08:05,401 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987977, now seen corresponding path program 235 times [2020-09-17 15:08:05,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:05,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104595917] [2020-09-17 15:08:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:06,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104595917] [2020-09-17 15:08:06,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983251471] [2020-09-17 15:08:06,541 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:06,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:06,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:06,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:06,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1037547641] [2020-09-17 15:08:06,670 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:06,673 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:06,685 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:06,685 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:06,687 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:06,687 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:06,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:06,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:06,813 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109208#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:08:06,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:06,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:06,814 INFO L87 Difference]: Start difference. First operand 115 states and 294 transitions. Second operand 35 states. [2020-09-17 15:08:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:11,424 INFO L93 Difference]: Finished difference Result 145 states and 356 transitions. [2020-09-17 15:08:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:08:11,426 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:11,426 INFO L225 Difference]: With dead ends: 145 [2020-09-17 15:08:11,426 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 15:08:11,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2067, Invalid=5589, Unknown=0, NotChecked=0, Total=7656 [2020-09-17 15:08:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 15:08:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2020-09-17 15:08:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-17 15:08:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 300 transitions. [2020-09-17 15:08:11,430 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 300 transitions. Word has length 38 [2020-09-17 15:08:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:11,430 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 300 transitions. [2020-09-17 15:08:11,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 300 transitions. [2020-09-17 15:08:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:08:11,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:11,431 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:11,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 15:08:11,641 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash 144102891, now seen corresponding path program 236 times [2020-09-17 15:08:11,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:11,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96967874] [2020-09-17 15:08:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96967874] [2020-09-17 15:08:12,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583455318] [2020-09-17 15:08:12,789 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:12,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:08:12,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:12,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:12,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:12,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [541732805] [2020-09-17 15:08:12,928 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:12,930 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:12,943 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:12,943 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:12,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:12,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:13,039 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:13,040 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:13,062 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109839#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-17 15:08:13,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:13,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:13,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:13,063 INFO L87 Difference]: Start difference. First operand 117 states and 300 transitions. Second operand 35 states. [2020-09-17 15:08:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:17,876 INFO L93 Difference]: Finished difference Result 143 states and 354 transitions. [2020-09-17 15:08:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:08:17,878 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:17,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:17,879 INFO L225 Difference]: With dead ends: 143 [2020-09-17 15:08:17,879 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 15:08:17,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2231, Invalid=5779, Unknown=0, NotChecked=0, Total=8010 [2020-09-17 15:08:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 15:08:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2020-09-17 15:08:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-17 15:08:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 306 transitions. [2020-09-17 15:08:17,881 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 306 transitions. Word has length 38 [2020-09-17 15:08:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:17,882 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 306 transitions. [2020-09-17 15:08:17,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 306 transitions. [2020-09-17 15:08:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:08:17,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:17,882 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:18,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:18,083 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:18,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1975810099, now seen corresponding path program 237 times [2020-09-17 15:08:18,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:18,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831115194] [2020-09-17 15:08:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:19,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831115194] [2020-09-17 15:08:19,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801548182] [2020-09-17 15:08:19,284 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:19,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-17 15:08:19,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:19,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:19,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:19,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:19,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452640980] [2020-09-17 15:08:19,433 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:19,435 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:19,448 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:19,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:19,450 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:19,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:19,548 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:19,548 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:19,570 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [110476#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-17 15:08:19,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:19,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:19,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:19,571 INFO L87 Difference]: Start difference. First operand 119 states and 306 transitions. Second operand 35 states. [2020-09-17 15:08:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:24,728 INFO L93 Difference]: Finished difference Result 141 states and 352 transitions. [2020-09-17 15:08:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:08:24,730 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:24,730 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:08:24,731 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:08:24,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2411, Invalid=5961, Unknown=0, NotChecked=0, Total=8372 [2020-09-17 15:08:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:08:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2020-09-17 15:08:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-17 15:08:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 312 transitions. [2020-09-17 15:08:24,734 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 312 transitions. Word has length 38 [2020-09-17 15:08:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:24,734 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 312 transitions. [2020-09-17 15:08:24,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 312 transitions. [2020-09-17 15:08:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:08:24,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:24,735 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:24,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 15:08:24,936 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:24,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1070025263, now seen corresponding path program 238 times [2020-09-17 15:08:24,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:24,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371453945] [2020-09-17 15:08:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:26,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371453945] [2020-09-17 15:08:26,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501172231] [2020-09-17 15:08:26,124 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:26,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:08:26,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:26,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:26,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:26,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564678226] [2020-09-17 15:08:26,266 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:26,268 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:26,281 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:26,281 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:26,283 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:26,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:26,379 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:26,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:26,400 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111119#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-17 15:08:26,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:26,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:26,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:26,401 INFO L87 Difference]: Start difference. First operand 121 states and 312 transitions. Second operand 35 states. [2020-09-17 15:08:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:31,816 INFO L93 Difference]: Finished difference Result 141 states and 355 transitions. [2020-09-17 15:08:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-17 15:08:31,819 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:31,819 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:08:31,819 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 15:08:31,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2607, Invalid=6135, Unknown=0, NotChecked=0, Total=8742 [2020-09-17 15:08:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 15:08:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-09-17 15:08:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-17 15:08:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 320 transitions. [2020-09-17 15:08:31,823 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 320 transitions. Word has length 38 [2020-09-17 15:08:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:31,823 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 320 transitions. [2020-09-17 15:08:31,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 320 transitions. [2020-09-17 15:08:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 15:08:31,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:31,823 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:32,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:32,024 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1086602513, now seen corresponding path program 239 times [2020-09-17 15:08:32,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:32,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64407149] [2020-09-17 15:08:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:33,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64407149] [2020-09-17 15:08:33,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205239412] [2020-09-17 15:08:33,245 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:33,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-17 15:08:33,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:33,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-17 15:08:33,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:33,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:33,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-17 15:08:33,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1266692724] [2020-09-17 15:08:33,401 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:33,403 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:33,416 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-17 15:08:33,416 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:33,417 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:33,417 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:33,516 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:33,516 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:33,595 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111770#(and (<= ~i~0 46) (<= ~j~0 36))] [2020-09-17 15:08:33,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-17 15:08:33,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:33,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-17 15:08:33,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 15:08:33,596 INFO L87 Difference]: Start difference. First operand 123 states and 320 transitions. Second operand 35 states. [2020-09-17 15:08:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:39,253 INFO L93 Difference]: Finished difference Result 141 states and 363 transitions. [2020-09-17 15:08:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-17 15:08:39,255 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-17 15:08:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:39,256 INFO L225 Difference]: With dead ends: 141 [2020-09-17 15:08:39,256 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 15:08:39,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2817, Invalid=6303, Unknown=0, NotChecked=0, Total=9120 [2020-09-17 15:08:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 15:08:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2020-09-17 15:08:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 15:08:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-17 15:08:39,259 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 38 [2020-09-17 15:08:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:39,259 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-17 15:08:39,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-17 15:08:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-17 15:08:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:39,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:39,260 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:39,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:39,460 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 315932105, now seen corresponding path program 240 times [2020-09-17 15:08:39,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:39,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551710901] [2020-09-17 15:08:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:41,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551710901] [2020-09-17 15:08:41,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014401611] [2020-09-17 15:08:41,071 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:41,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:08:41,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:41,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:41,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:41,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2082177280] [2020-09-17 15:08:41,177 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:41,181 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:41,198 INFO L274 McrAutomatonBuilder]: Finished intersection with 49 states and 59 transitions. [2020-09-17 15:08:41,198 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:41,199 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,199 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,292 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,292 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,374 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,374 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,382 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,382 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,402 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,415 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,490 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:41,502 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:41,521 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112363#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-17 15:08:41,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:41,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:41,523 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 36 states. [2020-09-17 15:08:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:44,433 INFO L93 Difference]: Finished difference Result 138 states and 322 transitions. [2020-09-17 15:08:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 15:08:44,436 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:44,436 INFO L225 Difference]: With dead ends: 138 [2020-09-17 15:08:44,436 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 15:08:44,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1393, Invalid=3299, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 15:08:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 15:08:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2020-09-17 15:08:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 15:08:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2020-09-17 15:08:44,440 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 39 [2020-09-17 15:08:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:44,440 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2020-09-17 15:08:44,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2020-09-17 15:08:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:44,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:44,441 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:44,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:44,641 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:44,642 INFO L82 PathProgramCache]: Analyzing trace with hash 5925291, now seen corresponding path program 241 times [2020-09-17 15:08:44,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:44,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85821647] [2020-09-17 15:08:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:46,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85821647] [2020-09-17 15:08:46,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303156938] [2020-09-17 15:08:46,239 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:46,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:46,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:46,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1212500647] [2020-09-17 15:08:46,344 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:46,346 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:46,360 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:46,360 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:46,361 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:46,361 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:46,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:46,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:46,497 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112913#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-17 15:08:46,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:46,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:46,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:46,499 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand 36 states. [2020-09-17 15:08:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:49,651 INFO L93 Difference]: Finished difference Result 202 states and 452 transitions. [2020-09-17 15:08:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 15:08:49,653 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:49,654 INFO L225 Difference]: With dead ends: 202 [2020-09-17 15:08:49,654 INFO L226 Difference]: Without dead ends: 196 [2020-09-17 15:08:49,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1464, Invalid=3792, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 15:08:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-17 15:08:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 100. [2020-09-17 15:08:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 15:08:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 248 transitions. [2020-09-17 15:08:49,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 248 transitions. Word has length 39 [2020-09-17 15:08:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:49,658 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 248 transitions. [2020-09-17 15:08:49,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 248 transitions. [2020-09-17 15:08:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:49,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:49,659 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:49,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:49,867 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1178753523, now seen corresponding path program 242 times [2020-09-17 15:08:49,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:49,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993712404] [2020-09-17 15:08:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:51,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993712404] [2020-09-17 15:08:51,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978882738] [2020-09-17 15:08:51,429 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:51,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:08:51,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:51,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:51,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:51,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:51,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1935362655] [2020-09-17 15:08:51,533 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:51,536 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:51,548 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:51,548 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:51,552 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:51,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:51,658 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:51,659 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:51,677 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [113539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-17 15:08:51,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:51,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:51,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:51,678 INFO L87 Difference]: Start difference. First operand 100 states and 248 transitions. Second operand 36 states. [2020-09-17 15:08:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:08:54,881 INFO L93 Difference]: Finished difference Result 199 states and 448 transitions. [2020-09-17 15:08:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 15:08:54,884 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:08:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:08:54,885 INFO L225 Difference]: With dead ends: 199 [2020-09-17 15:08:54,885 INFO L226 Difference]: Without dead ends: 193 [2020-09-17 15:08:54,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1481, Invalid=4069, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 15:08:54,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-17 15:08:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 102. [2020-09-17 15:08:54,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 15:08:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 254 transitions. [2020-09-17 15:08:54,889 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 254 transitions. Word has length 39 [2020-09-17 15:08:54,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:08:54,889 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 254 transitions. [2020-09-17 15:08:54,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:08:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 254 transitions. [2020-09-17 15:08:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:08:54,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:08:54,890 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:08:55,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-17 15:08:55,091 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:08:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:08:55,091 INFO L82 PathProgramCache]: Analyzing trace with hash -500657425, now seen corresponding path program 243 times [2020-09-17 15:08:55,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:08:55,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247454281] [2020-09-17 15:08:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:08:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:08:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:56,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247454281] [2020-09-17 15:08:56,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550614260] [2020-09-17 15:08:56,636 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:08:56,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:08:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:08:56,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:08:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:08:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:08:56,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:08:56,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:08:56,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1619233959] [2020-09-17 15:08:56,754 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:08:56,756 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:08:56,769 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:08:56,769 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:08:56,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:56,774 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:56,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:08:56,880 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:08:56,899 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114170#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-17 15:08:56,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:08:56,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:08:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:08:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:08:56,900 INFO L87 Difference]: Start difference. First operand 102 states and 254 transitions. Second operand 36 states. [2020-09-17 15:09:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:00,324 INFO L93 Difference]: Finished difference Result 197 states and 446 transitions. [2020-09-17 15:09:00,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 15:09:00,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:00,327 INFO L225 Difference]: With dead ends: 197 [2020-09-17 15:09:00,327 INFO L226 Difference]: Without dead ends: 191 [2020-09-17 15:09:00,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 15:09:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-17 15:09:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2020-09-17 15:09:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 15:09:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2020-09-17 15:09:00,330 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 39 [2020-09-17 15:09:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:00,330 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2020-09-17 15:09:00,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2020-09-17 15:09:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:00,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:00,331 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:00,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 15:09:00,532 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash 550326353, now seen corresponding path program 244 times [2020-09-17 15:09:00,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:00,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118434542] [2020-09-17 15:09:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:02,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118434542] [2020-09-17 15:09:02,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721808157] [2020-09-17 15:09:02,034 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:02,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:09:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:02,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:02,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:02,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [599137782] [2020-09-17 15:09:02,152 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:02,154 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:02,168 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:02,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:02,173 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:02,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:02,280 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:02,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:02,301 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-17 15:09:02,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:02,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:02,302 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand 36 states. [2020-09-17 15:09:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:05,922 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2020-09-17 15:09:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 15:09:05,925 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:05,926 INFO L225 Difference]: With dead ends: 195 [2020-09-17 15:09:05,926 INFO L226 Difference]: Without dead ends: 189 [2020-09-17 15:09:05,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1563, Invalid=4599, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 15:09:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-17 15:09:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2020-09-17 15:09:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 15:09:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 266 transitions. [2020-09-17 15:09:05,929 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 266 transitions. Word has length 39 [2020-09-17 15:09:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:05,929 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 266 transitions. [2020-09-17 15:09:05,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 266 transitions. [2020-09-17 15:09:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:05,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:05,930 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:06,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 15:09:06,131 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2098856397, now seen corresponding path program 245 times [2020-09-17 15:09:06,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:06,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772982145] [2020-09-17 15:09:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:07,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772982145] [2020-09-17 15:09:07,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109043177] [2020-09-17 15:09:07,641 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:07,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:09:07,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:07,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:07,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:07,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [49998387] [2020-09-17 15:09:07,771 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:07,773 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:07,786 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:07,786 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:07,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:07,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:07,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:07,904 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:07,923 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [115450#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-17 15:09:07,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:07,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:07,924 INFO L87 Difference]: Start difference. First operand 106 states and 266 transitions. Second operand 36 states. [2020-09-17 15:09:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:11,902 INFO L93 Difference]: Finished difference Result 193 states and 442 transitions. [2020-09-17 15:09:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 15:09:11,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:11,905 INFO L225 Difference]: With dead ends: 193 [2020-09-17 15:09:11,906 INFO L226 Difference]: Without dead ends: 187 [2020-09-17 15:09:11,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1628, Invalid=4852, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 15:09:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-17 15:09:11,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2020-09-17 15:09:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 15:09:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 272 transitions. [2020-09-17 15:09:11,909 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 272 transitions. Word has length 39 [2020-09-17 15:09:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:11,909 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 272 transitions. [2020-09-17 15:09:11,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 272 transitions. [2020-09-17 15:09:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:11,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:11,910 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:12,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 15:09:12,111 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1572125845, now seen corresponding path program 246 times [2020-09-17 15:09:12,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:12,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316910465] [2020-09-17 15:09:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:13,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316910465] [2020-09-17 15:09:13,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704360731] [2020-09-17 15:09:13,493 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:13,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:09:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:13,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:13,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:13,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198606800] [2020-09-17 15:09:13,624 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:13,626 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:13,638 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:13,638 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:13,642 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:13,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:13,748 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:13,748 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:13,768 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116099#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-17 15:09:13,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:13,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:13,769 INFO L87 Difference]: Start difference. First operand 108 states and 272 transitions. Second operand 36 states. [2020-09-17 15:09:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:17,967 INFO L93 Difference]: Finished difference Result 191 states and 440 transitions. [2020-09-17 15:09:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 15:09:17,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:17,970 INFO L225 Difference]: With dead ends: 191 [2020-09-17 15:09:17,970 INFO L226 Difference]: Without dead ends: 185 [2020-09-17 15:09:17,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1709, Invalid=5097, Unknown=0, NotChecked=0, Total=6806 [2020-09-17 15:09:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-17 15:09:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2020-09-17 15:09:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 15:09:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 278 transitions. [2020-09-17 15:09:17,973 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 278 transitions. Word has length 39 [2020-09-17 15:09:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:17,973 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 278 transitions. [2020-09-17 15:09:17,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 278 transitions. [2020-09-17 15:09:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:17,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:17,974 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:18,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:18,174 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:18,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1333548169, now seen corresponding path program 247 times [2020-09-17 15:09:18,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:18,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626623671] [2020-09-17 15:09:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:19,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626623671] [2020-09-17 15:09:19,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106672700] [2020-09-17 15:09:19,545 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:19,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:19,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:19,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2020997994] [2020-09-17 15:09:19,669 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:19,672 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:19,684 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:19,684 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:19,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:19,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:19,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:19,799 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:19,818 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116754#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-17 15:09:19,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:19,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:19,819 INFO L87 Difference]: Start difference. First operand 110 states and 278 transitions. Second operand 36 states. [2020-09-17 15:09:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:24,330 INFO L93 Difference]: Finished difference Result 189 states and 438 transitions. [2020-09-17 15:09:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 15:09:24,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:24,333 INFO L225 Difference]: With dead ends: 189 [2020-09-17 15:09:24,334 INFO L226 Difference]: Without dead ends: 183 [2020-09-17 15:09:24,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1806, Invalid=5334, Unknown=0, NotChecked=0, Total=7140 [2020-09-17 15:09:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-17 15:09:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 112. [2020-09-17 15:09:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 15:09:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-09-17 15:09:24,337 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 39 [2020-09-17 15:09:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:24,337 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-09-17 15:09:24,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-09-17 15:09:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:24,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:24,338 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:24,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 15:09:24,547 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash 111471321, now seen corresponding path program 248 times [2020-09-17 15:09:24,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:24,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353010408] [2020-09-17 15:09:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:25,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353010408] [2020-09-17 15:09:25,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991761237] [2020-09-17 15:09:25,990 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:26,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 15:09:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:26,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:26,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:26,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1355977240] [2020-09-17 15:09:26,121 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:26,124 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:26,136 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:26,137 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:26,141 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:26,141 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:26,252 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:26,253 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:26,273 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [117415#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-17 15:09:26,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:26,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:26,274 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 36 states. [2020-09-17 15:09:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:30,962 INFO L93 Difference]: Finished difference Result 187 states and 436 transitions. [2020-09-17 15:09:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 15:09:30,965 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:30,966 INFO L225 Difference]: With dead ends: 187 [2020-09-17 15:09:30,966 INFO L226 Difference]: Without dead ends: 181 [2020-09-17 15:09:30,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1919, Invalid=5563, Unknown=0, NotChecked=0, Total=7482 [2020-09-17 15:09:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-17 15:09:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 114. [2020-09-17 15:09:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-17 15:09:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 290 transitions. [2020-09-17 15:09:30,969 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 290 transitions. Word has length 39 [2020-09-17 15:09:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:30,969 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 290 transitions. [2020-09-17 15:09:30,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 290 transitions. [2020-09-17 15:09:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:30,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:30,970 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:31,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:31,171 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -646800709, now seen corresponding path program 249 times [2020-09-17 15:09:31,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:31,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307250142] [2020-09-17 15:09:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:32,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307250142] [2020-09-17 15:09:32,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450273562] [2020-09-17 15:09:32,611 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:32,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-17 15:09:32,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:32,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:32,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:32,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1174423910] [2020-09-17 15:09:32,770 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:32,773 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:32,785 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:32,785 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:32,790 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:32,790 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:32,902 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:32,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:32,923 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118082#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-17 15:09:32,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:32,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:32,924 INFO L87 Difference]: Start difference. First operand 114 states and 290 transitions. Second operand 36 states. [2020-09-17 15:09:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:37,914 INFO L93 Difference]: Finished difference Result 185 states and 434 transitions. [2020-09-17 15:09:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 15:09:37,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:37,918 INFO L225 Difference]: With dead ends: 185 [2020-09-17 15:09:37,918 INFO L226 Difference]: Without dead ends: 179 [2020-09-17 15:09:37,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2048, Invalid=5784, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 15:09:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-17 15:09:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 116. [2020-09-17 15:09:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-17 15:09:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 296 transitions. [2020-09-17 15:09:37,922 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 296 transitions. Word has length 39 [2020-09-17 15:09:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:37,922 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 296 transitions. [2020-09-17 15:09:37,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 296 transitions. [2020-09-17 15:09:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:37,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:37,922 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:38,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:38,123 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1917770525, now seen corresponding path program 250 times [2020-09-17 15:09:38,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:38,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498497084] [2020-09-17 15:09:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:39,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498497084] [2020-09-17 15:09:39,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633564101] [2020-09-17 15:09:39,501 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:39,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 15:09:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:39,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:39,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:39,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [492137487] [2020-09-17 15:09:39,643 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:39,645 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:39,675 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:39,675 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:39,679 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:39,680 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:39,790 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:39,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:39,811 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118755#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-17 15:09:39,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:39,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:39,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:39,812 INFO L87 Difference]: Start difference. First operand 116 states and 296 transitions. Second operand 36 states. [2020-09-17 15:09:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:45,078 INFO L93 Difference]: Finished difference Result 183 states and 432 transitions. [2020-09-17 15:09:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-17 15:09:45,081 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:45,082 INFO L225 Difference]: With dead ends: 183 [2020-09-17 15:09:45,082 INFO L226 Difference]: Without dead ends: 177 [2020-09-17 15:09:45,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2193, Invalid=5997, Unknown=0, NotChecked=0, Total=8190 [2020-09-17 15:09:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-17 15:09:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 118. [2020-09-17 15:09:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-17 15:09:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 302 transitions. [2020-09-17 15:09:45,086 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 302 transitions. Word has length 39 [2020-09-17 15:09:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:45,086 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 302 transitions. [2020-09-17 15:09:45,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 302 transitions. [2020-09-17 15:09:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:45,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:45,087 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:45,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:45,290 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:45,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:45,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1285803007, now seen corresponding path program 251 times [2020-09-17 15:09:45,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:45,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826131154] [2020-09-17 15:09:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:46,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826131154] [2020-09-17 15:09:46,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434734980] [2020-09-17 15:09:46,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:46,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-17 15:09:46,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-17 15:09:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:46,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:46,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:46,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1530862566] [2020-09-17 15:09:46,785 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:46,787 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:46,799 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:46,799 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:46,803 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:46,804 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:46,912 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:46,912 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:46,933 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [119434#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-17 15:09:46,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:46,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:46,934 INFO L87 Difference]: Start difference. First operand 118 states and 302 transitions. Second operand 36 states. [2020-09-17 15:09:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:09:52,369 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-17 15:09:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-17 15:09:52,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-17 15:09:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:09:52,372 INFO L225 Difference]: With dead ends: 181 [2020-09-17 15:09:52,373 INFO L226 Difference]: Without dead ends: 175 [2020-09-17 15:09:52,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2354, Invalid=6202, Unknown=0, NotChecked=0, Total=8556 [2020-09-17 15:09:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-17 15:09:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-17 15:09:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-17 15:09:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 308 transitions. [2020-09-17 15:09:52,376 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 308 transitions. Word has length 39 [2020-09-17 15:09:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:09:52,377 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 308 transitions. [2020-09-17 15:09:52,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-17 15:09:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 308 transitions. [2020-09-17 15:09:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-17 15:09:52,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:09:52,377 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:09:52,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:52,588 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 15:09:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:09:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash -136082079, now seen corresponding path program 252 times [2020-09-17 15:09:52,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:09:52,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052003998] [2020-09-17 15:09:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:09:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:09:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:54,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052003998] [2020-09-17 15:09:54,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213945563] [2020-09-17 15:09:54,052 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 15:09:54,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-17 15:09:54,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 15:09:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2020-09-17 15:09:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 15:09:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:09:54,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 15:09:54,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-17 15:09:54,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341331428] [2020-09-17 15:09:54,216 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:09:54,218 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:09:54,231 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-17 15:09:54,231 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:09:54,236 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:54,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:54,349 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 15:09:54,350 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 15:09:54,371 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [120119#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-17 15:09:54,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-17 15:09:54,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:09:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-17 15:09:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 15:09:54,372 INFO L87 Difference]: Start difference. First operand 120 states and 308 transitions. Second operand 36 states.