/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 0.1.25-60655ea [2020-09-15 13:47:21,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:47:21,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:47:21,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:47:21,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:47:21,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:47:21,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:47:21,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:47:21,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:47:21,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:47:21,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:47:21,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:47:21,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:47:21,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:47:21,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:47:21,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:47:21,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:47:21,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:47:21,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:47:21,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:47:21,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:47:21,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:47:21,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:47:21,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:47:21,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-15 13:47:21,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:47:21,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:47:21,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:47:21,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:47:21,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:47:21,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:47:21,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:47:21,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:47:21,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:47:21,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:47:21,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:47:21,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-15 13:47:21,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:47:21,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:47:21,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:47:21,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:47:21,151 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:47:21,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:47:21,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:47:21,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:47:21,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:47:21,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:47:21,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:47:21,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:47:21,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:47:21,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:47:21,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:47:21,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:47:21,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:47:21,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:47:21,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:47:21,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:47:21,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:47:21,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:47:21,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:47:21,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:47:21,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:47:21,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:47:21,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:47:21,161 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-15 13:47:21,161 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:47:21,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:47:21,162 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-15 13:47:21,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:47:21,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:47:21,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:47:21,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:47:21,672 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:47:21,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-15 13:47:21,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc4b5ce2/3b0058aed26f40c28327b2166389c558/FLAGbbf1bd174 [2020-09-15 13:47:22,500 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:47:22,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-15 13:47:22,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc4b5ce2/3b0058aed26f40c28327b2166389c558/FLAGbbf1bd174 [2020-09-15 13:47:22,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5bc4b5ce2/3b0058aed26f40c28327b2166389c558 [2020-09-15 13:47:22,685 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:47:22,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:47:22,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:47:22,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:47:22,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:47:22,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:47:22" (1/1) ... [2020-09-15 13:47:22,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620aac89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:22, skipping insertion in model container [2020-09-15 13:47:22,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:47:22" (1/1) ... [2020-09-15 13:47:22,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:47:22,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:47:23,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:47:23,532 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:47:23,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:47:23,716 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:47:23,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23 WrapperNode [2020-09-15 13:47:23,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:47:23,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:47:23,720 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:47:23,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:47:23,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:47:23,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:47:23,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:47:23,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:47:23,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... [2020-09-15 13:47:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:47:23,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:47:23,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:47:23,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:47:23,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:23,920 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 13:47:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 13:47:23,921 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 13:47:23,921 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 13:47:23,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:47:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 13:47:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:47:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:47:23,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 13:47:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:47:23,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:47:23,926 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:47:24,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:47:24,329 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 13:47:24,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:47:24 BoogieIcfgContainer [2020-09-15 13:47:24,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:47:24,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:47:24,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:47:24,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:47:24,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:47:22" (1/3) ... [2020-09-15 13:47:24,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fd23be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:47:24, skipping insertion in model container [2020-09-15 13:47:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:47:23" (2/3) ... [2020-09-15 13:47:24,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25fd23be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:47:24, skipping insertion in model container [2020-09-15 13:47:24,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:47:24" (3/3) ... [2020-09-15 13:47:24,345 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-15 13:47:24,357 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:47:24,357 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:47:24,367 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:47:24,368 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:47:24,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,397 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,402 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,403 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,411 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,412 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,413 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,426 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,426 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,427 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:47:24,452 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 13:47:24,477 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:47:24,478 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:47:24,478 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:47:24,478 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-15 13:47:24,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:47:24,479 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:47:24,479 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:47:24,479 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:47:24,497 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 13:47:24,499 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:47:24,544 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:47:24,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:47:24,552 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. [2020-09-15 13:47:24,555 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:47:24,575 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:47:24,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:47:24,576 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. [2020-09-15 13:47:24,578 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 13:47:24,580 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:47:25,679 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 13:47:25,907 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 13:47:25,908 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 13:47:25,913 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 13:47:25,928 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 13:47:25,931 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 13:47:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 13:47:25,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:25,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 13:47:25,942 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 13:47:25,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:25,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145016345] [2020-09-15 13:47:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:26,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145016345] [2020-09-15 13:47:26,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:47:26,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 13:47:26,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1064737137] [2020-09-15 13:47:26,246 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:26,250 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:26,268 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-15 13:47:26,268 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:26,270 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:47:26,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 13:47:26,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:26,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 13:47:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 13:47:26,294 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 13:47:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:26,368 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 13:47:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 13:47:26,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 13:47:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:26,386 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:47:26,386 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 13:47:26,388 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 [2020-09-15 13:47:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 13:47:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 13:47:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:47:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 13:47:26,439 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 13:47:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:26,439 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 13:47:26,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 13:47:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 13:47:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:47:26,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:26,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:26,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:47:26,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:26,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 13:47:26,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:26,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498628553] [2020-09-15 13:47:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:26,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498628553] [2020-09-15 13:47:26,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:47:26,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:47:26,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [985162046] [2020-09-15 13:47:26,566 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:26,568 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:26,571 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-15 13:47:26,571 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:26,611 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:47:26,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:47:26,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:26,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:47:26,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:47:26,614 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 13:47:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:26,651 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 13:47:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 13:47:26,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 13:47:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:26,653 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:47:26,654 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:47:26,655 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 [2020-09-15 13:47:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:47:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:47:26,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:47:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 13:47:26,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 13:47:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:26,665 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 13:47:26,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:47:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 13:47:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 13:47:26,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:26,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:26,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 13:47:26,667 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 13:47:26,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:26,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685327667] [2020-09-15 13:47:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:26,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685327667] [2020-09-15 13:47:26,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:47:26,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 13:47:26,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [224906711] [2020-09-15 13:47:26,770 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:26,771 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:26,775 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-15 13:47:26,775 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:26,783 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:26,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:26,831 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:26,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:47:26,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:47:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:47:26,833 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-15 13:47:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:26,956 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-15 13:47:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 13:47:26,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-15 13:47:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:26,958 INFO L225 Difference]: With dead ends: 62 [2020-09-15 13:47:26,959 INFO L226 Difference]: Without dead ends: 44 [2020-09-15 13:47:26,959 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 [2020-09-15 13:47:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-15 13:47:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-15 13:47:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 13:47:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 13:47:26,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-15 13:47:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:26,966 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 13:47:26,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:47:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 13:47:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:47:26,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:26,968 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:26,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 13:47:26,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-15 13:47:26,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:26,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125002413] [2020-09-15 13:47:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:27,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125002413] [2020-09-15 13:47:27,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886123300] [2020-09-15 13:47:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:27,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:27,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:47:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:27,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:27,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:47:27,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2113646050] [2020-09-15 13:47:27,174 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:27,175 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:27,178 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-15 13:47:27,178 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:27,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,206 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,207 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,228 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,229 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,243 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,244 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,255 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,255 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,263 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,283 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,297 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,297 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,309 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:47:27,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:47:27,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:47:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:47:27,310 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-15 13:47:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:27,476 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-15 13:47:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:47:27,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:47:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:27,478 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:47:27,478 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:47:27,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:47:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:47:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:47:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:47:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-15 13:47:27,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-15 13:47:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:27,489 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-15 13:47:27,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:47:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-15 13:47:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:47:27,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:27,492 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:27,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:27,706 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-15 13:47:27,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:27,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974674263] [2020-09-15 13:47:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:27,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974674263] [2020-09-15 13:47:27,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676583154] [2020-09-15 13:47:27,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:27,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:47:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:47:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:27,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:27,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:47:27,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2141797405] [2020-09-15 13:47:27,920 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:27,921 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:27,924 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-15 13:47:27,924 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:27,927 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:27,978 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:27,978 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:28,007 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:47:28,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:47:28,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:47:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:47:28,009 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-15 13:47:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:28,227 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-15 13:47:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:47:28,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:47:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:28,229 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:47:28,229 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:47:28,230 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 [2020-09-15 13:47:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:47:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-15 13:47:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:47:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-15 13:47:28,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-15 13:47:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:28,236 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-15 13:47:28,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:47:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-15 13:47:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:47:28,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:28,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:28,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:28,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-15 13:47:28,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:28,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825026224] [2020-09-15 13:47:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:28,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825026224] [2020-09-15 13:47:28,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076041621] [2020-09-15 13:47:28,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:28,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:47:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:28,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:28,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:47:28,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [197636214] [2020-09-15 13:47:28,652 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:28,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:28,656 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-15 13:47:28,657 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:28,664 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:28,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:28,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:28,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:28,749 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:28,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:47:28,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:47:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:47:28,751 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-15 13:47:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:28,970 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-15 13:47:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:47:28,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:47:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:28,972 INFO L225 Difference]: With dead ends: 64 [2020-09-15 13:47:28,972 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 13:47:28,973 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 [2020-09-15 13:47:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 13:47:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 13:47:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 13:47:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-15 13:47:28,984 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-15 13:47:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:28,984 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-15 13:47:28,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:47:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-15 13:47:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:47:28,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:28,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:29,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:29,201 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:29,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-15 13:47:29,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:29,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023971106] [2020-09-15 13:47:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:29,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023971106] [2020-09-15 13:47:29,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559971658] [2020-09-15 13:47:29,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:29,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:29,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:29,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:47:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:29,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:29,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:47:29,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1333552737] [2020-09-15 13:47:29,435 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:29,436 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:29,439 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-15 13:47:29,440 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:29,453 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:29,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:29,501 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:29,502 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:29,522 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:29,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:47:29,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:47:29,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:47:29,524 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-15 13:47:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:29,827 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-15 13:47:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:47:29,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:47:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:29,829 INFO L225 Difference]: With dead ends: 63 [2020-09-15 13:47:29,829 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 13:47:29,830 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 [2020-09-15 13:47:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 13:47:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-15 13:47:29,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:47:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 13:47:29,838 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-15 13:47:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:29,839 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 13:47:29,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:47:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 13:47:29,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:47:29,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:29,840 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:30,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:30,054 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-15 13:47:30,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:30,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483714684] [2020-09-15 13:47:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:30,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483714684] [2020-09-15 13:47:30,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471049117] [2020-09-15 13:47:30,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:30,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 13:47:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:47:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:30,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:30,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:47:30,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2006752160] [2020-09-15 13:47:30,303 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:30,304 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:30,310 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-15 13:47:30,310 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:30,311 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,312 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,341 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,341 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,373 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,374 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,384 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,385 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,395 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,403 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,403 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,427 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,437 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:30,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:30,451 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:47:30,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:47:30,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:47:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:47:30,453 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-15 13:47:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:30,635 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-15 13:47:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:47:30,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:47:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:30,636 INFO L225 Difference]: With dead ends: 60 [2020-09-15 13:47:30,636 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:47:30,637 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 [2020-09-15 13:47:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:47:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 13:47:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:47:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:47:30,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-15 13:47:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:30,648 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:47:30,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:47:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:47:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:47:30,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:30,653 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:30,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:30,871 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-15 13:47:30,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:30,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844282222] [2020-09-15 13:47:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:30,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844282222] [2020-09-15 13:47:30,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886419855] [2020-09-15 13:47:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:47:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:31,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:31,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:47:31,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [990757716] [2020-09-15 13:47:31,064 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:31,065 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:31,068 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:47:31,068 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:31,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:31,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:31,106 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:31,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:31,120 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:47:31,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:47:31,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:31,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:47:31,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:47:31,122 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-15 13:47:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:31,392 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 13:47:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:47:31,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:47:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:31,394 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:47:31,394 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 13:47:31,394 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 [2020-09-15 13:47:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 13:47:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 13:47:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 13:47:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-15 13:47:31,403 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-15 13:47:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:31,408 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-15 13:47:31,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:47:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-15 13:47:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:47:31,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:31,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:31,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:31,624 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-15 13:47:31,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:31,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702064265] [2020-09-15 13:47:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:31,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702064265] [2020-09-15 13:47:31,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542459591] [2020-09-15 13:47:31,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:31,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:31,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:47:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:31,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:31,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:47:31,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [424187661] [2020-09-15 13:47:31,844 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:31,845 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:31,848 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:47:31,848 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:31,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:31,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:31,882 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:31,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:31,899 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:31,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:47:31,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:47:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:47:31,901 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-15 13:47:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:32,252 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-15 13:47:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:47:32,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:47:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:32,254 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:47:32,254 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 13:47:32,255 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 [2020-09-15 13:47:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 13:47:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-15 13:47:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:47:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 13:47:32,260 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-15 13:47:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:32,260 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 13:47:32,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:47:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 13:47:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:47:32,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:32,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:32,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 13:47:32,462 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-15 13:47:32,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:32,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800594122] [2020-09-15 13:47:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:32,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800594122] [2020-09-15 13:47:32,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421392955] [2020-09-15 13:47:32,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:32,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:47:32,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:32,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:47:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:32,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:32,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:47:32,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [773271381] [2020-09-15 13:47:32,704 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:32,707 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:32,710 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-15 13:47:32,710 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:32,717 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:32,717 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:32,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:32,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:32,773 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:32,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:47:32,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:47:32,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:47:32,775 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-15 13:47:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:33,031 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-15 13:47:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:47:33,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:47:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:33,033 INFO L225 Difference]: With dead ends: 70 [2020-09-15 13:47:33,033 INFO L226 Difference]: Without dead ends: 64 [2020-09-15 13:47:33,034 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 [2020-09-15 13:47:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-15 13:47:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-15 13:47:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 13:47:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-15 13:47:33,050 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-15 13:47:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:33,050 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-15 13:47:33,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:47:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-15 13:47:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:47:33,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:33,052 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:33,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 13:47:33,253 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-15 13:47:33,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:33,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316334072] [2020-09-15 13:47:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:33,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316334072] [2020-09-15 13:47:33,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994483134] [2020-09-15 13:47:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:33,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:47:33,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:33,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:33,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:47:33,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712725740] [2020-09-15 13:47:33,448 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:33,449 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:33,451 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:47:33,452 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:33,459 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:33,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:33,493 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:33,494 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:33,511 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:33,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:47:33,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:47:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:47:33,513 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-15 13:47:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:33,776 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 13:47:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:47:33,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:47:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:33,779 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:47:33,779 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:47:33,780 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 [2020-09-15 13:47:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:47:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-15 13:47:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 13:47:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-15 13:47:33,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-15 13:47:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:33,785 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-15 13:47:33,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:47:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-15 13:47:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:47:33,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:33,786 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:33,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:33,999 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-15 13:47:34,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:34,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037685256] [2020-09-15 13:47:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:34,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037685256] [2020-09-15 13:47:34,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846839441] [2020-09-15 13:47:34,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:34,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 13:47:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:47:34,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:34,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:34,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:47:34,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319463809] [2020-09-15 13:47:34,214 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:34,220 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:34,225 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:47:34,225 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:34,238 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:34,238 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:34,282 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:34,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:34,304 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:47:34,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:47:34,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:47:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:47:34,306 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-15 13:47:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:34,624 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-15 13:47:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:47:34,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:47:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:34,625 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:47:34,625 INFO L226 Difference]: Without dead ends: 57 [2020-09-15 13:47:34,626 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 [2020-09-15 13:47:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-15 13:47:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-15 13:47:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:47:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 13:47:34,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-15 13:47:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:34,634 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 13:47:34,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:47:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 13:47:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:47:34,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:34,635 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:34,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:34,836 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-15 13:47:34,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:34,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339684758] [2020-09-15 13:47:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:34,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339684758] [2020-09-15 13:47:34,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821996595] [2020-09-15 13:47:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:35,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:47:35,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:47:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:35,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:35,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:47:35,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1232827869] [2020-09-15 13:47:35,056 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:35,057 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:35,060 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-15 13:47:35,061 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:35,062 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,099 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,124 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,131 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,139 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,140 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,158 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,158 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,163 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,172 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:47:35,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:47:35,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:47:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:47:35,174 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-15 13:47:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:35,392 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-15 13:47:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:47:35,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:47:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:35,394 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:47:35,394 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 13:47:35,395 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 [2020-09-15 13:47:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 13:47:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 13:47:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:47:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 13:47:35,399 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-15 13:47:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:35,399 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 13:47:35,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:47:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 13:47:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:47:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:35,400 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:35,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 13:47:35,604 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-15 13:47:35,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:35,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784337444] [2020-09-15 13:47:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:35,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784337444] [2020-09-15 13:47:35,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83371981] [2020-09-15 13:47:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:35,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:47:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:35,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:35,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:47:35,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [906300106] [2020-09-15 13:47:35,813 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:35,814 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:35,817 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:47:35,818 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:35,820 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,821 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:35,852 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:35,862 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:47:35,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:47:35,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:35,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:47:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:47:35,864 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-15 13:47:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:36,176 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-15 13:47:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:47:36,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:47:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:36,178 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:47:36,178 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 13:47:36,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:47:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 13:47:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 13:47:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 13:47:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-15 13:47:36,187 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-15 13:47:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:36,187 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-15 13:47:36,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:47:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-15 13:47:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:47:36,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:36,190 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:36,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 13:47:36,402 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-15 13:47:36,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:36,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116086547] [2020-09-15 13:47:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:36,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116086547] [2020-09-15 13:47:36,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420349193] [2020-09-15 13:47:36,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:36,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:47:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:36,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:36,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:47:36,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069714730] [2020-09-15 13:47:36,586 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:36,587 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:36,590 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:47:36,590 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:36,591 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:36,591 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:36,621 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:36,622 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:36,633 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:36,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:47:36,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:36,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:47:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:47:36,634 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-15 13:47:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:37,018 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 13:47:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:37,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:47:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:37,019 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:47:37,019 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:47:37,020 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 [2020-09-15 13:47:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:47:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-15 13:47:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:47:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-15 13:47:37,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-15 13:47:37,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:37,026 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-15 13:47:37,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:47:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-15 13:47:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:47:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:37,027 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:37,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 13:47:37,237 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-15 13:47:37,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:37,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479247430] [2020-09-15 13:47:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479247430] [2020-09-15 13:47:37,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404664052] [2020-09-15 13:47:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:37,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:47:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:37,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:47:37,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:37,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:37,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:47:37,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1029647126] [2020-09-15 13:47:37,441 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:37,444 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:37,447 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:47:37,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:37,455 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:37,455 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:37,495 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:37,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:37,551 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:37,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:47:37,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:47:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:47:37,553 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-15 13:47:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:37,981 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-15 13:47:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:47:37,982 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:47:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:37,983 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:47:37,983 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 13:47:37,984 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 [2020-09-15 13:47:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 13:47:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-15 13:47:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:47:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 13:47:37,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-15 13:47:37,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:37,987 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 13:47:37,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:47:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 13:47:37,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:47:37,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:37,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:38,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:38,189 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:38,190 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-15 13:47:38,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:38,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673236432] [2020-09-15 13:47:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:38,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673236432] [2020-09-15 13:47:38,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345037943] [2020-09-15 13:47:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:38,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:38,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:47:38,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:38,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:38,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:47:38,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1740094096] [2020-09-15 13:47:38,402 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:38,404 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:38,408 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-15 13:47:38,409 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:38,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:38,410 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:38,447 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:38,447 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:38,460 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:38,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:47:38,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:38,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:47:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:47:38,462 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-15 13:47:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:38,737 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 13:47:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:47:38,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:47:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:38,738 INFO L225 Difference]: With dead ends: 78 [2020-09-15 13:47:38,738 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 13:47:38,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:47:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 13:47:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-15 13:47:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 13:47:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-15 13:47:38,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-15 13:47:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:38,742 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-15 13:47:38,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:47:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-15 13:47:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:47:38,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:38,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:38,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:47:38,953 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-15 13:47:38,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:38,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489611473] [2020-09-15 13:47:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:39,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489611473] [2020-09-15 13:47:39,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041506517] [2020-09-15 13:47:39,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:39,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:47:39,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:47:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:39,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:39,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:47:39,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1939637848] [2020-09-15 13:47:39,185 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:39,187 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:39,191 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:47:39,191 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:39,195 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:39,195 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:39,238 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:39,238 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:39,249 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:39,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:47:39,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:39,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:47:39,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:47:39,250 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-15 13:47:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:39,586 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-15 13:47:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:47:39,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:47:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:39,588 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:47:39,588 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:47:39,588 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 [2020-09-15 13:47:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:47:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 13:47:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 13:47:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-15 13:47:39,593 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-15 13:47:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:39,594 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-15 13:47:39,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:47:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-15 13:47:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:47:39,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:39,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:39,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:39,800 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-15 13:47:39,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:39,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940435140] [2020-09-15 13:47:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:39,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940435140] [2020-09-15 13:47:39,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104229215] [2020-09-15 13:47:39,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:39,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:47:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:47:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:39,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:39,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:47:39,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821551158] [2020-09-15 13:47:39,995 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:39,997 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:39,999 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:47:40,000 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:40,002 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:40,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:40,034 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:40,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:40,045 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:47:40,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:47:40,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:47:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:47:40,047 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-15 13:47:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:40,452 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-15 13:47:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:40,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:47:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:40,454 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:47:40,454 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:47:40,455 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 [2020-09-15 13:47:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:47:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-15 13:47:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 13:47:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-15 13:47:40,464 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-15 13:47:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:40,464 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-15 13:47:40,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:47:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-15 13:47:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:47:40,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:40,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:40,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:40,679 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-15 13:47:40,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:40,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758558385] [2020-09-15 13:47:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:40,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758558385] [2020-09-15 13:47:40,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554188613] [2020-09-15 13:47:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:47:40,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:40,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:40,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:47:40,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912692788] [2020-09-15 13:47:40,893 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:40,895 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:40,900 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:47:40,900 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:40,902 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:40,902 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:40,947 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:40,948 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:40,963 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:47:40,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:47:40,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:47:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:47:40,964 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-15 13:47:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:41,466 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-15 13:47:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:47:41,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:47:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:41,468 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:47:41,468 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:47:41,471 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 [2020-09-15 13:47:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:47:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 13:47:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:47:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:47:41,477 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-15 13:47:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:41,477 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:47:41,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:47:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:47:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:47:41,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:41,478 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:41,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 13:47:41,688 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:41,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-15 13:47:41,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:41,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770346854] [2020-09-15 13:47:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:41,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770346854] [2020-09-15 13:47:41,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29620336] [2020-09-15 13:47:41,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:41,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:41,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:47:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:41,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:41,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:47:41,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [353253552] [2020-09-15 13:47:41,965 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:41,967 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:41,972 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-15 13:47:41,973 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:41,976 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:41,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,008 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,008 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,028 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,036 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,061 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,061 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,089 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,089 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,098 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,106 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:47:42,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:47:42,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:47:42,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:47:42,108 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-15 13:47:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:42,449 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-15 13:47:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:47:42,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:47:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:42,451 INFO L225 Difference]: With dead ends: 72 [2020-09-15 13:47:42,451 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 13:47:42,452 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 [2020-09-15 13:47:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 13:47:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 13:47:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:47:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 13:47:42,455 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-15 13:47:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:42,456 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 13:47:42,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:47:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 13:47:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:47:42,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:42,457 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:42,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:42,658 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-15 13:47:42,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:42,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031532936] [2020-09-15 13:47:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:42,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031532936] [2020-09-15 13:47:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006502652] [2020-09-15 13:47:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:42,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:47:42,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:47:42,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:42,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:42,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:47:42,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1619659262] [2020-09-15 13:47:42,905 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:42,907 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:42,910 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:47:42,910 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:42,912 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,912 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:42,965 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:42,976 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:47:42,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:47:42,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:47:42,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:47:42,978 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-15 13:47:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:43,392 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-15 13:47:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:43,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:47:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:43,394 INFO L225 Difference]: With dead ends: 92 [2020-09-15 13:47:43,394 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 13:47:43,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:47:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 13:47:43,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-15 13:47:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 13:47:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-15 13:47:43,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-15 13:47:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:43,398 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-15 13:47:43,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:47:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-15 13:47:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:47:43,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:43,399 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:43,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 13:47:43,600 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-15 13:47:43,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:43,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018737180] [2020-09-15 13:47:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:43,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018737180] [2020-09-15 13:47:43,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776436870] [2020-09-15 13:47:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:43,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:47:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:43,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:43,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:47:43,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984312417] [2020-09-15 13:47:43,838 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:43,840 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:43,843 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:47:43,843 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:43,850 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:43,851 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:43,881 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:43,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:43,891 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:43,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:47:43,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:47:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:47:43,892 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-15 13:47:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:44,337 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-15 13:47:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:47:44,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:47:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:44,339 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:47:44,339 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:47:44,339 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 [2020-09-15 13:47:44,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:47:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-15 13:47:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:47:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-15 13:47:44,343 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-15 13:47:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:44,343 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-15 13:47:44,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:47:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-15 13:47:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:47:44,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:44,344 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:44,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 13:47:44,555 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-15 13:47:44,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:44,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731112544] [2020-09-15 13:47:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:44,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731112544] [2020-09-15 13:47:44,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396896159] [2020-09-15 13:47:44,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:44,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:47:44,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:47:44,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:44,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:44,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:47:44,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [516087989] [2020-09-15 13:47:44,757 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:44,758 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:44,762 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:47:44,762 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:44,763 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:44,763 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:44,793 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:44,793 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:44,804 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:44,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:47:44,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:44,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:47:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:47:44,805 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-15 13:47:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:45,346 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-15 13:47:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:47:45,351 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:47:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:45,352 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:47:45,352 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:47:45,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:47:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:47:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 13:47:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 13:47:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-15 13:47:45,356 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-15 13:47:45,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:45,357 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-15 13:47:45,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:47:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-15 13:47:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:47:45,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:45,358 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:45,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:45,559 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-15 13:47:45,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:45,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878453976] [2020-09-15 13:47:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:45,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878453976] [2020-09-15 13:47:45,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725034951] [2020-09-15 13:47:45,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:45,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 13:47:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:47:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:45,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:45,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:47:45,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378562022] [2020-09-15 13:47:45,803 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:45,805 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:45,810 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:47:45,810 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:45,811 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:45,811 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:45,840 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:45,840 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:45,849 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:47:45,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:47:45,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:47:45,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:47:45,851 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-15 13:47:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:46,430 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-15 13:47:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 13:47:46,430 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:47:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:46,431 INFO L225 Difference]: With dead ends: 90 [2020-09-15 13:47:46,431 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 13:47:46,432 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 [2020-09-15 13:47:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 13:47:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-15 13:47:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:47:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 13:47:46,434 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-15 13:47:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:46,435 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 13:47:46,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:47:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 13:47:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:47:46,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:46,435 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:46,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 13:47:46,637 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-15 13:47:46,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:46,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143966466] [2020-09-15 13:47:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:46,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143966466] [2020-09-15 13:47:46,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547419959] [2020-09-15 13:47:46,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:47:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:46,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:46,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:47:46,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1170204277] [2020-09-15 13:47:46,900 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:46,902 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:46,906 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-15 13:47:46,906 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:46,909 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:46,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:46,942 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:46,942 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:46,954 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6427#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:46,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:47:46,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:47:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:47:46,956 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 15 states. [2020-09-15 13:47:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:47,318 INFO L93 Difference]: Finished difference Result 86 states and 198 transitions. [2020-09-15 13:47:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:47:47,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:47:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:47,319 INFO L225 Difference]: With dead ends: 86 [2020-09-15 13:47:47,319 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 13:47:47,320 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 [2020-09-15 13:47:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 13:47:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-15 13:47:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 13:47:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 140 transitions. [2020-09-15 13:47:47,323 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 140 transitions. Word has length 18 [2020-09-15 13:47:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:47,324 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 140 transitions. [2020-09-15 13:47:47,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:47:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 140 transitions. [2020-09-15 13:47:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:47:47,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:47,325 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:47,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:47,536 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:47,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:47,537 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 26 times [2020-09-15 13:47:47,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:47,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111878299] [2020-09-15 13:47:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:47,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111878299] [2020-09-15 13:47:47,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424097986] [2020-09-15 13:47:47,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:47,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:47,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:47:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:47,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:47,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:47:47,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690250822] [2020-09-15 13:47:47,766 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:47,767 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:47,770 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:47:47,770 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:47,797 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:47,797 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:47,840 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:47,841 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:47,854 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6719#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:47,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:47:47,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:47:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:47:47,856 INFO L87 Difference]: Start difference. First operand 57 states and 140 transitions. Second operand 15 states. [2020-09-15 13:47:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:48,300 INFO L93 Difference]: Finished difference Result 83 states and 194 transitions. [2020-09-15 13:47:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:48,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:47:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:48,302 INFO L225 Difference]: With dead ends: 83 [2020-09-15 13:47:48,302 INFO L226 Difference]: Without dead ends: 77 [2020-09-15 13:47:48,303 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 [2020-09-15 13:47:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-15 13:47:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-15 13:47:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-15 13:47:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 146 transitions. [2020-09-15 13:47:48,306 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 146 transitions. Word has length 18 [2020-09-15 13:47:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:48,306 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 146 transitions. [2020-09-15 13:47:48,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:47:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 146 transitions. [2020-09-15 13:47:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:47:48,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:48,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:48,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 13:47:48,510 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 27 times [2020-09-15 13:47:48,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:48,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116058176] [2020-09-15 13:47:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:48,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116058176] [2020-09-15 13:47:48,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417273368] [2020-09-15 13:47:48,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:48,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:47:48,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:47:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:48,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:48,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:47:48,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [795981652] [2020-09-15 13:47:48,748 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:48,750 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:48,755 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:47:48,755 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:48,756 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:48,756 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:48,790 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:48,790 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:48,803 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7016#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:47:48,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:47:48,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:47:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:47:48,804 INFO L87 Difference]: Start difference. First operand 59 states and 146 transitions. Second operand 15 states. [2020-09-15 13:47:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:49,345 INFO L93 Difference]: Finished difference Result 81 states and 192 transitions. [2020-09-15 13:47:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:47:49,346 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:47:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:49,347 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:47:49,347 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:47:49,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:47:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:47:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-15 13:47:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 13:47:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 152 transitions. [2020-09-15 13:47:49,355 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 152 transitions. Word has length 18 [2020-09-15 13:47:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:49,356 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 152 transitions. [2020-09-15 13:47:49,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:47:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 152 transitions. [2020-09-15 13:47:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:47:49,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:49,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:49,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-15 13:47:49,570 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:49,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 28 times [2020-09-15 13:47:49,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:49,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002470919] [2020-09-15 13:47:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002470919] [2020-09-15 13:47:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832103977] [2020-09-15 13:47:49,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:49,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:49,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:47:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:49,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:49,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:47:49,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101950441] [2020-09-15 13:47:49,862 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:49,867 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:49,873 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:47:49,873 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:49,874 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:49,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:49,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:49,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:49,940 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7319#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:47:49,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:47:49,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:49,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:47:49,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:47:49,942 INFO L87 Difference]: Start difference. First operand 61 states and 152 transitions. Second operand 15 states. [2020-09-15 13:47:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:50,514 INFO L93 Difference]: Finished difference Result 81 states and 195 transitions. [2020-09-15 13:47:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:47:50,519 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:47:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:50,521 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:47:50,521 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:47:50,522 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 [2020-09-15 13:47:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:47:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-09-15 13:47:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 13:47:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-09-15 13:47:50,525 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 18 [2020-09-15 13:47:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:50,525 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-09-15 13:47:50,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:47:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-09-15 13:47:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:47:50,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:50,526 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:50,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:50,736 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 29 times [2020-09-15 13:47:50,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:50,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700842682] [2020-09-15 13:47:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:50,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700842682] [2020-09-15 13:47:50,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167843020] [2020-09-15 13:47:50,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:50,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:47:50,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:50,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:47:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:51,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:51,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-15 13:47:51,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259559741] [2020-09-15 13:47:51,010 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:51,011 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:51,015 INFO L274 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-09-15 13:47:51,016 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:51,016 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:51,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:51,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:51,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:51,076 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7630#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:47:51,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:47:51,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:51,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:47:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:47:51,078 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 15 states. [2020-09-15 13:47:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:51,792 INFO L93 Difference]: Finished difference Result 81 states and 203 transitions. [2020-09-15 13:47:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 13:47:51,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-15 13:47:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:51,793 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:47:51,794 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:47:51,795 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 [2020-09-15 13:47:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:47:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2020-09-15 13:47:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:47:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 13:47:51,797 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 18 [2020-09-15 13:47:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 13:47:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:47:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 13:47:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:51,798 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:52,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:52,008 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 30 times [2020-09-15 13:47:52,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:52,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612317395] [2020-09-15 13:47:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:52,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612317395] [2020-09-15 13:47:52,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978005160] [2020-09-15 13:47:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:52,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 13:47:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:52,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:52,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:52,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:52,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:52,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566800026] [2020-09-15 13:47:52,284 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:52,286 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:52,290 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2020-09-15 13:47:52,290 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:52,291 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,326 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,327 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,347 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,347 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,364 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,364 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,372 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,372 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,396 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,406 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:52,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:52,413 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7923#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:47:52,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:52,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:52,415 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 16 states. [2020-09-15 13:47:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:52,805 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-09-15 13:47:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:52,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:52,806 INFO L225 Difference]: With dead ends: 78 [2020-09-15 13:47:52,806 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 13:47:52,807 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 [2020-09-15 13:47:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 13:47:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-15 13:47:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:47:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-15 13:47:52,809 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 19 [2020-09-15 13:47:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:52,810 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-15 13:47:52,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-15 13:47:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:52,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:52,811 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:53,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 13:47:53,012 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 31 times [2020-09-15 13:47:53,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:53,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411227261] [2020-09-15 13:47:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:53,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411227261] [2020-09-15 13:47:53,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097650397] [2020-09-15 13:47:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:53,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:53,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:53,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342029987] [2020-09-15 13:47:53,257 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:53,259 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:53,262 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-15 13:47:53,262 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:53,263 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:53,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:53,300 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:53,300 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:53,317 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:47:53,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:53,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:53,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:53,318 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 16 states. [2020-09-15 13:47:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:53,812 INFO L93 Difference]: Finished difference Result 102 states and 232 transitions. [2020-09-15 13:47:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:47:53,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:53,817 INFO L225 Difference]: With dead ends: 102 [2020-09-15 13:47:53,817 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 13:47:53,818 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 [2020-09-15 13:47:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 13:47:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2020-09-15 13:47:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 13:47:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 148 transitions. [2020-09-15 13:47:53,821 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 148 transitions. Word has length 19 [2020-09-15 13:47:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:53,821 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 148 transitions. [2020-09-15 13:47:53,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 148 transitions. [2020-09-15 13:47:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:53,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:53,822 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:54,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:47:54,033 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 32 times [2020-09-15 13:47:54,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:54,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984581081] [2020-09-15 13:47:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:54,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984581081] [2020-09-15 13:47:54,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761586846] [2020-09-15 13:47:54,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:47:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:54,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:54,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:54,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [236466994] [2020-09-15 13:47:54,314 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:54,319 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:54,327 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-15 13:47:54,328 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:54,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:54,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:54,370 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:54,371 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:54,386 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:54,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:54,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:54,389 INFO L87 Difference]: Start difference. First operand 60 states and 148 transitions. Second operand 16 states. [2020-09-15 13:47:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:54,915 INFO L93 Difference]: Finished difference Result 99 states and 228 transitions. [2020-09-15 13:47:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:47:54,916 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:54,917 INFO L225 Difference]: With dead ends: 99 [2020-09-15 13:47:54,917 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 13:47:54,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:47:54,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 13:47:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-09-15 13:47:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 13:47:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 154 transitions. [2020-09-15 13:47:54,921 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 154 transitions. Word has length 19 [2020-09-15 13:47:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:54,921 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 154 transitions. [2020-09-15 13:47:54,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 154 transitions. [2020-09-15 13:47:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:54,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:54,922 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:55,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 13:47:55,136 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 33 times [2020-09-15 13:47:55,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:55,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93852468] [2020-09-15 13:47:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:55,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93852468] [2020-09-15 13:47:55,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727819493] [2020-09-15 13:47:55,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:55,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 13:47:55,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:55,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:55,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:55,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523536375] [2020-09-15 13:47:55,415 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:55,417 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:55,421 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-15 13:47:55,421 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:55,424 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:55,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:55,455 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:55,456 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:55,466 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8870#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:47:55,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:55,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:55,467 INFO L87 Difference]: Start difference. First operand 62 states and 154 transitions. Second operand 16 states. [2020-09-15 13:47:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:56,089 INFO L93 Difference]: Finished difference Result 97 states and 226 transitions. [2020-09-15 13:47:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:47:56,090 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:56,090 INFO L225 Difference]: With dead ends: 97 [2020-09-15 13:47:56,091 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 13:47:56,091 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 [2020-09-15 13:47:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 13:47:56,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2020-09-15 13:47:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 13:47:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 160 transitions. [2020-09-15 13:47:56,098 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 160 transitions. Word has length 19 [2020-09-15 13:47:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:56,098 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 160 transitions. [2020-09-15 13:47:56,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 160 transitions. [2020-09-15 13:47:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:56,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:56,103 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:56,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-15 13:47:56,316 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:56,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 34 times [2020-09-15 13:47:56,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:56,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467474377] [2020-09-15 13:47:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:56,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467474377] [2020-09-15 13:47:56,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866510677] [2020-09-15 13:47:56,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:56,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:47:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:56,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:56,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:56,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:56,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1248707651] [2020-09-15 13:47:56,557 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:56,559 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:56,563 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-15 13:47:56,563 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:56,566 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:56,566 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:56,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:56,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:56,614 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:47:56,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:56,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:56,616 INFO L87 Difference]: Start difference. First operand 64 states and 160 transitions. Second operand 16 states. [2020-09-15 13:47:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:57,308 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-15 13:47:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:47:57,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:57,310 INFO L225 Difference]: With dead ends: 97 [2020-09-15 13:47:57,310 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 13:47:57,310 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 [2020-09-15 13:47:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 13:47:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-15 13:47:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 13:47:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-09-15 13:47:57,313 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 19 [2020-09-15 13:47:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:57,316 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-09-15 13:47:57,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-09-15 13:47:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:47:57,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:57,317 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:57,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 13:47:57,529 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 35 times [2020-09-15 13:47:57,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:57,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820936481] [2020-09-15 13:47:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:57,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820936481] [2020-09-15 13:47:57,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982238533] [2020-09-15 13:47:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:57,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 13:47:57,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:47:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:57,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:57,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-15 13:47:57,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1761988823] [2020-09-15 13:47:57,771 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:57,773 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:57,776 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-09-15 13:47:57,776 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:57,777 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:57,777 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:57,830 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:57,831 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:57,842 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9552#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:47:57,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 13:47:57,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 13:47:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:47:57,844 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 16 states. [2020-09-15 13:47:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:58,586 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-15 13:47:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 13:47:58,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-15 13:47:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:58,588 INFO L225 Difference]: With dead ends: 98 [2020-09-15 13:47:58,588 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 13:47:58,589 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 [2020-09-15 13:47:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 13:47:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-09-15 13:47:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:47:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-15 13:47:58,596 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 19 [2020-09-15 13:47:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:58,597 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-15 13:47:58,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 13:47:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-15 13:47:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:47:58,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:58,597 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:58,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-15 13:47:58,809 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 36 times [2020-09-15 13:47:58,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:58,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846945632] [2020-09-15 13:47:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:47:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:59,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846945632] [2020-09-15 13:47:59,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496710448] [2020-09-15 13:47:59,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:47:59,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-15 13:47:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:47:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:47:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:47:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:47:59,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:47:59,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:47:59,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [182880837] [2020-09-15 13:47:59,126 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:47:59,129 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:47:59,134 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2020-09-15 13:47:59,134 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:47:59,137 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:59,138 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:59,189 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:47:59,190 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:47:59,206 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9882#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:47:59,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:47:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:47:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:47:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:47:59,208 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 17 states. [2020-09-15 13:47:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:47:59,648 INFO L93 Difference]: Finished difference Result 94 states and 216 transitions. [2020-09-15 13:47:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:47:59,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:47:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:47:59,649 INFO L225 Difference]: With dead ends: 94 [2020-09-15 13:47:59,649 INFO L226 Difference]: Without dead ends: 88 [2020-09-15 13:47:59,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:47:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-15 13:47:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-09-15 13:47:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-15 13:47:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 150 transitions. [2020-09-15 13:47:59,653 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 150 transitions. Word has length 20 [2020-09-15 13:47:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:47:59,653 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 150 transitions. [2020-09-15 13:47:59,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:47:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 150 transitions. [2020-09-15 13:47:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:47:59,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:47:59,654 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:47:59,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 13:47:59,864 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:47:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:47:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 37 times [2020-09-15 13:47:59,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:47:59,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773404503] [2020-09-15 13:47:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:47:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:00,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773404503] [2020-09-15 13:48:00,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328275781] [2020-09-15 13:48:00,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:48:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:00,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:00,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:48:00,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809090590] [2020-09-15 13:48:00,147 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:00,148 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:00,152 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-15 13:48:00,152 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:00,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:00,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:00,195 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:00,196 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:00,207 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10202#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:00,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:48:00,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:48:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:48:00,209 INFO L87 Difference]: Start difference. First operand 61 states and 150 transitions. Second operand 17 states. [2020-09-15 13:48:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:00,753 INFO L93 Difference]: Finished difference Result 91 states and 212 transitions. [2020-09-15 13:48:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:48:00,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:48:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:00,756 INFO L225 Difference]: With dead ends: 91 [2020-09-15 13:48:00,756 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 13:48:00,757 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 [2020-09-15 13:48:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 13:48:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2020-09-15 13:48:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-15 13:48:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 156 transitions. [2020-09-15 13:48:00,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 156 transitions. Word has length 20 [2020-09-15 13:48:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:00,760 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 156 transitions. [2020-09-15 13:48:00,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:48:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 156 transitions. [2020-09-15 13:48:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:48:00,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:00,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:00,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 13:48:00,971 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:00,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 38 times [2020-09-15 13:48:00,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:00,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909334848] [2020-09-15 13:48:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:01,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909334848] [2020-09-15 13:48:01,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165020553] [2020-09-15 13:48:01,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:01,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:48:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:01,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:01,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:48:01,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [88849001] [2020-09-15 13:48:01,253 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:01,255 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:01,259 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-15 13:48:01,260 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:01,263 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:01,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:01,299 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:01,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:01,317 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10527#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:01,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:48:01,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:48:01,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:48:01,318 INFO L87 Difference]: Start difference. First operand 63 states and 156 transitions. Second operand 17 states. [2020-09-15 13:48:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:01,918 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-09-15 13:48:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:48:01,919 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:48:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:01,920 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:48:01,920 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:48:01,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=928, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:48:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:48:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-09-15 13:48:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 13:48:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 162 transitions. [2020-09-15 13:48:01,924 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 162 transitions. Word has length 20 [2020-09-15 13:48:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:01,924 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 162 transitions. [2020-09-15 13:48:01,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:48:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 162 transitions. [2020-09-15 13:48:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:48:01,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:01,925 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:02,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 13:48:02,136 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 39 times [2020-09-15 13:48:02,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:02,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247535917] [2020-09-15 13:48:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:02,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247535917] [2020-09-15 13:48:02,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506395480] [2020-09-15 13:48:02,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:02,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-15 13:48:02,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:48:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:02,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:02,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:48:02,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1420439989] [2020-09-15 13:48:02,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:02,419 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:02,425 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-15 13:48:02,425 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:02,427 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:02,428 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:02,463 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:02,464 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:02,474 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10858#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:02,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:48:02,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:48:02,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:48:02,476 INFO L87 Difference]: Start difference. First operand 65 states and 162 transitions. Second operand 17 states. [2020-09-15 13:48:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:03,138 INFO L93 Difference]: Finished difference Result 87 states and 208 transitions. [2020-09-15 13:48:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:03,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:48:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:03,140 INFO L225 Difference]: With dead ends: 87 [2020-09-15 13:48:03,140 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 13:48:03,141 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 [2020-09-15 13:48:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 13:48:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-09-15 13:48:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 13:48:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 168 transitions. [2020-09-15 13:48:03,144 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 168 transitions. Word has length 20 [2020-09-15 13:48:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:03,145 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 168 transitions. [2020-09-15 13:48:03,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:48:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 168 transitions. [2020-09-15 13:48:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:48:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:03,146 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:03,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:03,356 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 40 times [2020-09-15 13:48:03,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:03,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829543451] [2020-09-15 13:48:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:03,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829543451] [2020-09-15 13:48:03,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697892231] [2020-09-15 13:48:03,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:03,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:48:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:03,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:03,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:48:03,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1013653674] [2020-09-15 13:48:03,627 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:03,630 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:03,635 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-15 13:48:03,635 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:03,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:03,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:03,672 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:03,673 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:03,686 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11195#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:03,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:48:03,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:48:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:48:03,687 INFO L87 Difference]: Start difference. First operand 67 states and 168 transitions. Second operand 17 states. [2020-09-15 13:48:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:04,446 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-09-15 13:48:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:04,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:48:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:04,448 INFO L225 Difference]: With dead ends: 87 [2020-09-15 13:48:04,448 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 13:48:04,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 13:48:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 13:48:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-15 13:48:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 13:48:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 176 transitions. [2020-09-15 13:48:04,452 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 176 transitions. Word has length 20 [2020-09-15 13:48:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:04,452 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 176 transitions. [2020-09-15 13:48:04,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:48:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 176 transitions. [2020-09-15 13:48:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-15 13:48:04,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:04,453 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:04,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:04,663 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 41 times [2020-09-15 13:48:04,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:04,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522334530] [2020-09-15 13:48:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:04,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522334530] [2020-09-15 13:48:04,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759709294] [2020-09-15 13:48:04,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:04,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-15 13:48:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:48:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:04,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:04,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-15 13:48:04,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1953881195] [2020-09-15 13:48:04,896 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:04,897 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:04,900 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-09-15 13:48:04,901 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:04,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:04,903 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:04,944 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:04,944 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:04,956 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11540#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:48:04,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:48:04,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:48:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:48:04,957 INFO L87 Difference]: Start difference. First operand 69 states and 176 transitions. Second operand 17 states. [2020-09-15 13:48:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:05,787 INFO L93 Difference]: Finished difference Result 87 states and 219 transitions. [2020-09-15 13:48:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 13:48:05,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-15 13:48:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:05,789 INFO L225 Difference]: With dead ends: 87 [2020-09-15 13:48:05,790 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:48:05,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 13:48:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:48:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-15 13:48:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:48:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 13:48:05,795 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2020-09-15 13:48:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:05,795 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 13:48:05,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:48:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 13:48:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:05,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:05,797 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:05,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:05,999 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 42 times [2020-09-15 13:48:06,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:06,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599446379] [2020-09-15 13:48:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:06,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599446379] [2020-09-15 13:48:06,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122569536] [2020-09-15 13:48:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:06,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 13:48:06,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:06,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:06,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:06,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [39611478] [2020-09-15 13:48:06,335 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:06,336 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:06,341 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2020-09-15 13:48:06,341 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:06,342 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,342 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,375 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,375 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,397 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,414 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,422 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,422 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,427 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,448 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,459 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:06,459 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:06,469 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11863#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:48:06,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:06,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:06,471 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 18 states. [2020-09-15 13:48:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:06,944 INFO L93 Difference]: Finished difference Result 84 states and 196 transitions. [2020-09-15 13:48:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:48:06,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:06,946 INFO L225 Difference]: With dead ends: 84 [2020-09-15 13:48:06,946 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 13:48:06,947 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 [2020-09-15 13:48:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 13:48:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-15 13:48:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 13:48:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-15 13:48:06,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-09-15 13:48:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:06,951 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-15 13:48:06,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-15 13:48:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:06,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:06,951 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:07,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 13:48:07,162 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 43 times [2020-09-15 13:48:07,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:07,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081784852] [2020-09-15 13:48:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:07,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081784852] [2020-09-15 13:48:07,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692458014] [2020-09-15 13:48:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:07,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:07,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:07,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [42812509] [2020-09-15 13:48:07,483 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:07,486 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:07,491 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:07,491 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:07,494 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:07,495 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:07,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:07,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:07,544 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12179#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:48:07,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:07,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:07,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:07,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:07,545 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-09-15 13:48:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:08,098 INFO L93 Difference]: Finished difference Result 112 states and 254 transitions. [2020-09-15 13:48:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:48:08,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:08,101 INFO L225 Difference]: With dead ends: 112 [2020-09-15 13:48:08,101 INFO L226 Difference]: Without dead ends: 106 [2020-09-15 13:48:08,102 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 [2020-09-15 13:48:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-15 13:48:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-09-15 13:48:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 13:48:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 158 transitions. [2020-09-15 13:48:08,104 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 158 transitions. Word has length 21 [2020-09-15 13:48:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:08,105 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 158 transitions. [2020-09-15 13:48:08,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 158 transitions. [2020-09-15 13:48:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:08,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:08,106 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:08,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:08,316 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:08,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:08,316 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 44 times [2020-09-15 13:48:08,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:08,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803567232] [2020-09-15 13:48:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:08,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803567232] [2020-09-15 13:48:08,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368217621] [2020-09-15 13:48:08,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:08,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:08,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:08,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:08,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:08,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1763675404] [2020-09-15 13:48:08,603 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:08,605 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:08,625 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:08,626 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:08,629 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:08,629 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:08,673 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:08,674 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:08,681 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12535#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:48:08,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:08,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:08,682 INFO L87 Difference]: Start difference. First operand 64 states and 158 transitions. Second operand 18 states. [2020-09-15 13:48:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:09,318 INFO L93 Difference]: Finished difference Result 109 states and 250 transitions. [2020-09-15 13:48:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:09,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:09,320 INFO L225 Difference]: With dead ends: 109 [2020-09-15 13:48:09,321 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 13:48:09,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 13:48:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 13:48:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 66. [2020-09-15 13:48:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 13:48:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 164 transitions. [2020-09-15 13:48:09,325 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 164 transitions. Word has length 21 [2020-09-15 13:48:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:09,326 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 164 transitions. [2020-09-15 13:48:09,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 164 transitions. [2020-09-15 13:48:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:09,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:09,326 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:09,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:09,539 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 45 times [2020-09-15 13:48:09,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:09,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023771663] [2020-09-15 13:48:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:09,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023771663] [2020-09-15 13:48:09,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801719245] [2020-09-15 13:48:09,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:09,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 13:48:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:09,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:09,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [222247708] [2020-09-15 13:48:09,815 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:09,817 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:09,822 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:09,822 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:09,825 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:09,825 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:09,858 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:09,859 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:09,869 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12896#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:09,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:09,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:09,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:09,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:09,870 INFO L87 Difference]: Start difference. First operand 66 states and 164 transitions. Second operand 18 states. [2020-09-15 13:48:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:10,586 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-15 13:48:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:10,587 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:10,588 INFO L225 Difference]: With dead ends: 107 [2020-09-15 13:48:10,588 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 13:48:10,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 13:48:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 13:48:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-09-15 13:48:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 13:48:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2020-09-15 13:48:10,591 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 21 [2020-09-15 13:48:10,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:10,591 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2020-09-15 13:48:10,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2020-09-15 13:48:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:10,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:10,592 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:10,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-15 13:48:10,793 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:10,794 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 46 times [2020-09-15 13:48:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:10,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969267570] [2020-09-15 13:48:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:11,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969267570] [2020-09-15 13:48:11,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765486440] [2020-09-15 13:48:11,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:11,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:11,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:11,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:11,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2014043501] [2020-09-15 13:48:11,085 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:11,087 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:11,091 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:11,092 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:11,094 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:11,094 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:11,132 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:11,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:11,141 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:11,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:11,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:11,143 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand 18 states. [2020-09-15 13:48:11,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:11,957 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-15 13:48:11,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:48:11,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:11,958 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:48:11,959 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:48:11,960 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 [2020-09-15 13:48:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:48:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-15 13:48:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:48:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 176 transitions. [2020-09-15 13:48:11,963 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 176 transitions. Word has length 21 [2020-09-15 13:48:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:11,963 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 176 transitions. [2020-09-15 13:48:11,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 176 transitions. [2020-09-15 13:48:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:11,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:11,965 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:12,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 13:48:12,176 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:12,176 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 47 times [2020-09-15 13:48:12,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:12,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049345686] [2020-09-15 13:48:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049345686] [2020-09-15 13:48:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471416350] [2020-09-15 13:48:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:12,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 13:48:12,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:12,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:12,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:12,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1586633782] [2020-09-15 13:48:12,456 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:12,458 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:12,464 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:12,464 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:12,467 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:12,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:12,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:12,510 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:12,521 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13636#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:12,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:12,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:12,522 INFO L87 Difference]: Start difference. First operand 70 states and 176 transitions. Second operand 18 states. [2020-09-15 13:48:13,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:13,369 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-09-15 13:48:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:48:13,370 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:13,371 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:48:13,371 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:48:13,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=593, Invalid=1387, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 13:48:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:48:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-09-15 13:48:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 13:48:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 184 transitions. [2020-09-15 13:48:13,376 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 184 transitions. Word has length 21 [2020-09-15 13:48:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:13,376 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 184 transitions. [2020-09-15 13:48:13,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 184 transitions. [2020-09-15 13:48:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-15 13:48:13,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:13,377 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:13,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 13:48:13,589 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 48 times [2020-09-15 13:48:13,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:13,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889074782] [2020-09-15 13:48:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:13,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889074782] [2020-09-15 13:48:13,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956284339] [2020-09-15 13:48:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:13,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 13:48:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-15 13:48:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:13,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:13,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-15 13:48:13,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [5740484] [2020-09-15 13:48:13,873 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:13,875 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:13,880 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-09-15 13:48:13,880 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:13,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:13,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:13,935 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:13,936 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:13,945 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14017#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:13,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:48:13,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:48:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:48:13,946 INFO L87 Difference]: Start difference. First operand 72 states and 184 transitions. Second operand 18 states. [2020-09-15 13:48:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:14,885 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2020-09-15 13:48:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 13:48:14,888 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-15 13:48:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:14,888 INFO L225 Difference]: With dead ends: 106 [2020-09-15 13:48:14,888 INFO L226 Difference]: Without dead ends: 94 [2020-09-15 13:48:14,889 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 [2020-09-15 13:48:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-15 13:48:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-09-15 13:48:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:48:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-15 13:48:14,892 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-09-15 13:48:14,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:14,892 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-15 13:48:14,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:48:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-15 13:48:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:14,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:14,893 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:15,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:15,103 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 49 times [2020-09-15 13:48:15,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:15,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024086527] [2020-09-15 13:48:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:15,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024086527] [2020-09-15 13:48:15,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66908307] [2020-09-15 13:48:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:15,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:15,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:15,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150825618] [2020-09-15 13:48:15,446 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:15,449 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:15,454 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-15 13:48:15,454 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:15,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:15,458 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:15,507 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:15,507 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:15,519 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14379#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:48:15,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:15,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:15,520 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 19 states. [2020-09-15 13:48:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:16,042 INFO L93 Difference]: Finished difference Result 102 states and 234 transitions. [2020-09-15 13:48:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:48:16,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:16,044 INFO L225 Difference]: With dead ends: 102 [2020-09-15 13:48:16,044 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 13:48:16,045 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 [2020-09-15 13:48:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 13:48:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2020-09-15 13:48:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-15 13:48:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 160 transitions. [2020-09-15 13:48:16,047 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 160 transitions. Word has length 22 [2020-09-15 13:48:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:16,048 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 160 transitions. [2020-09-15 13:48:16,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 160 transitions. [2020-09-15 13:48:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:16,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:16,049 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:16,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:16,250 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 50 times [2020-09-15 13:48:16,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:16,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522041311] [2020-09-15 13:48:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:16,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522041311] [2020-09-15 13:48:16,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127061844] [2020-09-15 13:48:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:16,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:16,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:16,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505251469] [2020-09-15 13:48:16,553 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:16,556 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:16,561 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:16,561 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:16,561 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:16,561 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:16,601 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:16,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:16,613 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14727#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:16,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:16,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:16,615 INFO L87 Difference]: Start difference. First operand 65 states and 160 transitions. Second operand 19 states. [2020-09-15 13:48:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:17,225 INFO L93 Difference]: Finished difference Result 99 states and 230 transitions. [2020-09-15 13:48:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:48:17,226 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:17,226 INFO L225 Difference]: With dead ends: 99 [2020-09-15 13:48:17,226 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 13:48:17,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 13:48:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 13:48:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2020-09-15 13:48:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-15 13:48:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2020-09-15 13:48:17,229 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 22 [2020-09-15 13:48:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:17,229 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2020-09-15 13:48:17,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2020-09-15 13:48:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:17,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:17,230 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:17,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:17,431 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 51 times [2020-09-15 13:48:17,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287103170] [2020-09-15 13:48:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:17,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287103170] [2020-09-15 13:48:17,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910368411] [2020-09-15 13:48:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:17,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 13:48:17,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:17,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:17,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:17,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393614779] [2020-09-15 13:48:17,792 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:17,795 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:17,802 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:17,802 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:17,807 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:17,807 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:17,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:17,854 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:17,866 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15080#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:17,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:17,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:17,868 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand 19 states. [2020-09-15 13:48:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:18,535 INFO L93 Difference]: Finished difference Result 97 states and 228 transitions. [2020-09-15 13:48:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:18,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:18,537 INFO L225 Difference]: With dead ends: 97 [2020-09-15 13:48:18,537 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 13:48:18,538 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 [2020-09-15 13:48:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 13:48:18,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2020-09-15 13:48:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 13:48:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2020-09-15 13:48:18,541 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 22 [2020-09-15 13:48:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:18,541 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2020-09-15 13:48:18,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:18,541 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2020-09-15 13:48:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:18,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:18,542 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:18,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:18,742 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 52 times [2020-09-15 13:48:18,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:18,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840563183] [2020-09-15 13:48:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:18,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840563183] [2020-09-15 13:48:18,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104215046] [2020-09-15 13:48:18,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:19,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:19,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:19,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:19,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:19,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323472212] [2020-09-15 13:48:19,052 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:19,053 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:19,058 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:19,058 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:19,060 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:19,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:19,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:19,108 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:19,124 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15439#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:19,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:19,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:19,125 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand 19 states. [2020-09-15 13:48:19,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:19,896 INFO L93 Difference]: Finished difference Result 95 states and 226 transitions. [2020-09-15 13:48:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:19,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:19,898 INFO L225 Difference]: With dead ends: 95 [2020-09-15 13:48:19,898 INFO L226 Difference]: Without dead ends: 89 [2020-09-15 13:48:19,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 13:48:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-15 13:48:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2020-09-15 13:48:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 13:48:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 178 transitions. [2020-09-15 13:48:19,902 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 178 transitions. Word has length 22 [2020-09-15 13:48:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:19,902 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 178 transitions. [2020-09-15 13:48:19,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 178 transitions. [2020-09-15 13:48:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:19,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:19,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:20,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-15 13:48:20,104 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 53 times [2020-09-15 13:48:20,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:20,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091712155] [2020-09-15 13:48:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:20,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091712155] [2020-09-15 13:48:20,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235658388] [2020-09-15 13:48:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:20,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-15 13:48:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:20,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:20,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:20,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2071799271] [2020-09-15 13:48:20,420 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:20,422 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:20,428 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:20,428 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:20,430 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:20,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:20,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:20,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:20,484 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15804#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:20,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:20,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:20,485 INFO L87 Difference]: Start difference. First operand 71 states and 178 transitions. Second operand 19 states. [2020-09-15 13:48:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:21,309 INFO L93 Difference]: Finished difference Result 93 states and 224 transitions. [2020-09-15 13:48:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:48:21,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:21,315 INFO L225 Difference]: With dead ends: 93 [2020-09-15 13:48:21,315 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 13:48:21,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=523, Invalid=1369, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 13:48:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 13:48:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-09-15 13:48:21,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 13:48:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 184 transitions. [2020-09-15 13:48:21,318 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 184 transitions. Word has length 22 [2020-09-15 13:48:21,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:21,319 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 184 transitions. [2020-09-15 13:48:21,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 184 transitions. [2020-09-15 13:48:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:21,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:21,320 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:21,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:21,529 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 54 times [2020-09-15 13:48:21,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:21,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119058382] [2020-09-15 13:48:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:21,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119058382] [2020-09-15 13:48:21,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470282707] [2020-09-15 13:48:21,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:21,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 13:48:21,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:21,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:21,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:21,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [938746792] [2020-09-15 13:48:21,840 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:21,842 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:21,848 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:21,848 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:21,849 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:21,849 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:21,891 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:21,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:21,908 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16175#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:48:21,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:21,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:21,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:21,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:21,909 INFO L87 Difference]: Start difference. First operand 73 states and 184 transitions. Second operand 19 states. [2020-09-15 13:48:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:22,817 INFO L93 Difference]: Finished difference Result 93 states and 227 transitions. [2020-09-15 13:48:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:48:22,818 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:22,819 INFO L225 Difference]: With dead ends: 93 [2020-09-15 13:48:22,819 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 13:48:22,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 13:48:22,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 13:48:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2020-09-15 13:48:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 13:48:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2020-09-15 13:48:22,823 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 22 [2020-09-15 13:48:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:22,823 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2020-09-15 13:48:22,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2020-09-15 13:48:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:48:22,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:22,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 13:48:23,025 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 55 times [2020-09-15 13:48:23,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:23,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732635666] [2020-09-15 13:48:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:23,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732635666] [2020-09-15 13:48:23,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276722255] [2020-09-15 13:48:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:48:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:23,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:23,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-15 13:48:23,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1368069827] [2020-09-15 13:48:23,290 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:23,292 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:23,296 INFO L274 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-09-15 13:48:23,296 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:23,296 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:23,297 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:23,339 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:23,340 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:23,351 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16554#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:48:23,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:48:23,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:48:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:48:23,352 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand 19 states. [2020-09-15 13:48:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:24,366 INFO L93 Difference]: Finished difference Result 93 states and 235 transitions. [2020-09-15 13:48:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 13:48:24,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-15 13:48:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:24,368 INFO L225 Difference]: With dead ends: 93 [2020-09-15 13:48:24,368 INFO L226 Difference]: Without dead ends: 81 [2020-09-15 13:48:24,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=1551, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 13:48:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-15 13:48:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-09-15 13:48:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:48:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-15 13:48:24,371 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 22 [2020-09-15 13:48:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:24,371 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-15 13:48:24,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:48:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-15 13:48:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:24,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:24,372 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:24,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-15 13:48:24,581 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 56 times [2020-09-15 13:48:24,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:24,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154770380] [2020-09-15 13:48:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:24,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154770380] [2020-09-15 13:48:24,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746213957] [2020-09-15 13:48:24,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:24,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:24,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:24,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:24,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1110213038] [2020-09-15 13:48:24,967 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:24,972 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:24,981 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 43 transitions. [2020-09-15 13:48:24,981 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:24,984 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:24,984 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,016 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,037 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,038 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,051 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,051 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,061 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,061 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,065 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,065 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,092 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,103 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:25,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:25,115 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16907#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:48:25,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:25,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:25,117 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 20 states. [2020-09-15 13:48:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:25,718 INFO L93 Difference]: Finished difference Result 90 states and 210 transitions. [2020-09-15 13:48:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:48:25,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:25,720 INFO L225 Difference]: With dead ends: 90 [2020-09-15 13:48:25,721 INFO L226 Difference]: Without dead ends: 84 [2020-09-15 13:48:25,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=947, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:48:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-15 13:48:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-15 13:48:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 13:48:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-15 13:48:25,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 23 [2020-09-15 13:48:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:25,726 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-15 13:48:25,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-15 13:48:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:25,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:25,727 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:25,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:25,939 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 57 times [2020-09-15 13:48:25,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:25,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304192281] [2020-09-15 13:48:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:26,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304192281] [2020-09-15 13:48:26,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870473360] [2020-09-15 13:48:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 13:48:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:26,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:26,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:26,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:26,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1344449789] [2020-09-15 13:48:26,448 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:26,453 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:26,460 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:26,461 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:26,462 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:26,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:26,510 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:26,511 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:26,525 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17249#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:48:26,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:26,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:26,527 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-09-15 13:48:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:27,156 INFO L93 Difference]: Finished difference Result 122 states and 276 transitions. [2020-09-15 13:48:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:27,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:27,158 INFO L225 Difference]: With dead ends: 122 [2020-09-15 13:48:27,158 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 13:48:27,159 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 [2020-09-15 13:48:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 13:48:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 68. [2020-09-15 13:48:27,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-15 13:48:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 168 transitions. [2020-09-15 13:48:27,165 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 168 transitions. Word has length 23 [2020-09-15 13:48:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:27,165 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 168 transitions. [2020-09-15 13:48:27,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 168 transitions. [2020-09-15 13:48:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:27,166 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:27,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 13:48:27,374 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 58 times [2020-09-15 13:48:27,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:27,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712467519] [2020-09-15 13:48:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:27,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:27,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712467519] [2020-09-15 13:48:27,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042523329] [2020-09-15 13:48:27,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:27,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:27,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:27,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:27,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [607693365] [2020-09-15 13:48:27,735 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:27,737 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:27,741 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:27,741 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:27,744 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:27,744 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:27,784 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:27,785 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:27,801 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:48:27,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:27,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:27,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:27,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:27,802 INFO L87 Difference]: Start difference. First operand 68 states and 168 transitions. Second operand 20 states. [2020-09-15 13:48:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:28,531 INFO L93 Difference]: Finished difference Result 119 states and 272 transitions. [2020-09-15 13:48:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:28,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:28,533 INFO L225 Difference]: With dead ends: 119 [2020-09-15 13:48:28,533 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 13:48:28,533 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 [2020-09-15 13:48:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 13:48:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2020-09-15 13:48:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:48:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 174 transitions. [2020-09-15 13:48:28,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 174 transitions. Word has length 23 [2020-09-15 13:48:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:28,536 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 174 transitions. [2020-09-15 13:48:28,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 174 transitions. [2020-09-15 13:48:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:28,537 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:28,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:28,738 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 59 times [2020-09-15 13:48:28,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:28,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776942867] [2020-09-15 13:48:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:28,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776942867] [2020-09-15 13:48:28,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909825629] [2020-09-15 13:48:28,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:29,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 13:48:29,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:29,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:29,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:29,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:29,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [543757226] [2020-09-15 13:48:29,096 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:29,098 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:29,103 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:29,103 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:29,106 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:29,106 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:29,148 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:29,148 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:29,158 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18026#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:29,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:29,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:29,159 INFO L87 Difference]: Start difference. First operand 70 states and 174 transitions. Second operand 20 states. [2020-09-15 13:48:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:29,972 INFO L93 Difference]: Finished difference Result 117 states and 270 transitions. [2020-09-15 13:48:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:48:29,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:29,974 INFO L225 Difference]: With dead ends: 117 [2020-09-15 13:48:29,974 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 13:48:29,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 13:48:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 13:48:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 72. [2020-09-15 13:48:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 13:48:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 180 transitions. [2020-09-15 13:48:29,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 180 transitions. Word has length 23 [2020-09-15 13:48:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:29,978 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 180 transitions. [2020-09-15 13:48:29,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 180 transitions. [2020-09-15 13:48:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:29,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:29,979 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:30,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-15 13:48:30,180 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:30,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:30,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 60 times [2020-09-15 13:48:30,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:30,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292143176] [2020-09-15 13:48:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:30,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292143176] [2020-09-15 13:48:30,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048038600] [2020-09-15 13:48:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:30,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 13:48:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:30,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:30,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:30,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:30,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1665574613] [2020-09-15 13:48:30,509 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:30,511 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:30,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:30,516 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:30,517 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:30,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:30,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:30,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:30,575 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18423#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:30,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:30,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:30,576 INFO L87 Difference]: Start difference. First operand 72 states and 180 transitions. Second operand 20 states. [2020-09-15 13:48:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:31,465 INFO L93 Difference]: Finished difference Result 115 states and 268 transitions. [2020-09-15 13:48:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:48:31,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:31,469 INFO L225 Difference]: With dead ends: 115 [2020-09-15 13:48:31,469 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 13:48:31,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 13:48:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 13:48:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-09-15 13:48:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 13:48:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 186 transitions. [2020-09-15 13:48:31,472 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 186 transitions. Word has length 23 [2020-09-15 13:48:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:31,472 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 186 transitions. [2020-09-15 13:48:31,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 186 transitions. [2020-09-15 13:48:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:31,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:31,473 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:31,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:31,674 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 61 times [2020-09-15 13:48:31,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:31,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565873649] [2020-09-15 13:48:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:31,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565873649] [2020-09-15 13:48:31,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112050154] [2020-09-15 13:48:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:31,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:31,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:31,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [340650261] [2020-09-15 13:48:31,993 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:31,995 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:32,001 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:32,002 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:32,007 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:32,007 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:32,042 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:32,042 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:32,052 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18826#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:32,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:32,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:32,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:32,053 INFO L87 Difference]: Start difference. First operand 74 states and 186 transitions. Second operand 20 states. [2020-09-15 13:48:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:32,968 INFO L93 Difference]: Finished difference Result 113 states and 266 transitions. [2020-09-15 13:48:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:48:32,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:32,970 INFO L225 Difference]: With dead ends: 113 [2020-09-15 13:48:32,970 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 13:48:32,971 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 [2020-09-15 13:48:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 13:48:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 76. [2020-09-15 13:48:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 13:48:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2020-09-15 13:48:32,973 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 23 [2020-09-15 13:48:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:32,973 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2020-09-15 13:48:32,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2020-09-15 13:48:32,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:32,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:32,974 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:33,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-15 13:48:33,175 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 62 times [2020-09-15 13:48:33,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:33,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309160899] [2020-09-15 13:48:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:33,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309160899] [2020-09-15 13:48:33,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493168346] [2020-09-15 13:48:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:33,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:33,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:33,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:33,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1962275587] [2020-09-15 13:48:33,506 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:33,509 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:33,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:33,516 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:33,520 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:33,520 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:33,565 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:33,565 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:33,577 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19235#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:33,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:33,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:33,578 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand 20 states. [2020-09-15 13:48:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:34,579 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-15 13:48:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:48:34,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:34,581 INFO L225 Difference]: With dead ends: 113 [2020-09-15 13:48:34,581 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 13:48:34,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 13:48:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 13:48:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2020-09-15 13:48:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:48:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-09-15 13:48:34,585 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 23 [2020-09-15 13:48:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:34,585 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-09-15 13:48:34,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-09-15 13:48:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-15 13:48:34,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:34,586 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:34,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:34,787 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 63 times [2020-09-15 13:48:34,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:34,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870984596] [2020-09-15 13:48:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:35,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870984596] [2020-09-15 13:48:35,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258925260] [2020-09-15 13:48:35,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:35,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 13:48:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-15 13:48:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:35,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:35,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-15 13:48:35,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [877834505] [2020-09-15 13:48:35,136 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:35,139 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:35,146 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-09-15 13:48:35,146 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:35,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:35,154 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:35,195 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:35,195 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:35,206 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19652#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:48:35,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:48:35,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:35,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:48:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:48:35,208 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 20 states. [2020-09-15 13:48:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:36,316 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-15 13:48:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 13:48:36,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-15 13:48:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:36,320 INFO L225 Difference]: With dead ends: 114 [2020-09-15 13:48:36,320 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 13:48:36,321 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 [2020-09-15 13:48:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 13:48:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2020-09-15 13:48:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 13:48:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-15 13:48:36,324 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 23 [2020-09-15 13:48:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:36,324 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-15 13:48:36,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:48:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-15 13:48:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:36,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:36,325 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:36,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 13:48:36,528 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 64 times [2020-09-15 13:48:36,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:36,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806986694] [2020-09-15 13:48:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:36,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806986694] [2020-09-15 13:48:36,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731532391] [2020-09-15 13:48:36,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:36,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:36,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:36,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:36,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:36,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1379148510] [2020-09-15 13:48:36,941 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:36,943 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:36,949 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2020-09-15 13:48:36,950 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:36,960 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:36,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:37,004 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:37,004 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:37,022 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20046#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:48:37,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:37,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:37,023 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 21 states. [2020-09-15 13:48:37,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:37,620 INFO L93 Difference]: Finished difference Result 110 states and 252 transitions. [2020-09-15 13:48:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:48:37,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:37,622 INFO L225 Difference]: With dead ends: 110 [2020-09-15 13:48:37,622 INFO L226 Difference]: Without dead ends: 104 [2020-09-15 13:48:37,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 13:48:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-15 13:48:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-09-15 13:48:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-15 13:48:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 170 transitions. [2020-09-15 13:48:37,627 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 170 transitions. Word has length 24 [2020-09-15 13:48:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:37,627 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 170 transitions. [2020-09-15 13:48:37,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 170 transitions. [2020-09-15 13:48:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:37,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:37,628 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:37,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:37,830 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 65 times [2020-09-15 13:48:37,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:37,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362170128] [2020-09-15 13:48:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:38,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362170128] [2020-09-15 13:48:38,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034090696] [2020-09-15 13:48:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:38,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 13:48:38,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:38,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:38,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:38,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:38,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879513108] [2020-09-15 13:48:38,236 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:38,249 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:38,259 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:38,259 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:38,262 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:38,262 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:38,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:38,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:38,318 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20422#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:38,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:38,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:38,319 INFO L87 Difference]: Start difference. First operand 69 states and 170 transitions. Second operand 21 states. [2020-09-15 13:48:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:39,016 INFO L93 Difference]: Finished difference Result 107 states and 248 transitions. [2020-09-15 13:48:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:39,017 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:39,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:39,018 INFO L225 Difference]: With dead ends: 107 [2020-09-15 13:48:39,018 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 13:48:39,019 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 [2020-09-15 13:48:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 13:48:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2020-09-15 13:48:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 13:48:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 176 transitions. [2020-09-15 13:48:39,022 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 176 transitions. Word has length 24 [2020-09-15 13:48:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:39,022 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 176 transitions. [2020-09-15 13:48:39,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 176 transitions. [2020-09-15 13:48:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:39,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:39,023 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:39,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 13:48:39,229 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 66 times [2020-09-15 13:48:39,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:39,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186837563] [2020-09-15 13:48:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:39,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186837563] [2020-09-15 13:48:39,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258234586] [2020-09-15 13:48:39,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:39,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-15 13:48:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:39,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:39,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:39,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261714719] [2020-09-15 13:48:39,624 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:39,626 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:39,631 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:39,631 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:39,633 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:39,634 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:39,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:39,683 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:39,693 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20803#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:39,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:39,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:39,694 INFO L87 Difference]: Start difference. First operand 71 states and 176 transitions. Second operand 21 states. [2020-09-15 13:48:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:40,486 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-15 13:48:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:40,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:40,488 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:48:40,488 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:48:40,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 13:48:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:48:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2020-09-15 13:48:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 13:48:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2020-09-15 13:48:40,491 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 24 [2020-09-15 13:48:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:40,491 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2020-09-15 13:48:40,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2020-09-15 13:48:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:40,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:40,492 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:40,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-15 13:48:40,703 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:40,703 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 67 times [2020-09-15 13:48:40,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:40,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11570035] [2020-09-15 13:48:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:40,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11570035] [2020-09-15 13:48:40,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456021514] [2020-09-15 13:48:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:41,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:41,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:41,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:41,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1417994235] [2020-09-15 13:48:41,077 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:41,079 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:41,087 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:41,087 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:41,090 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:41,090 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:41,170 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:41,171 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:41,183 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21190#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:41,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:41,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:41,184 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand 21 states. [2020-09-15 13:48:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:42,058 INFO L93 Difference]: Finished difference Result 103 states and 244 transitions. [2020-09-15 13:48:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:48:42,059 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:42,060 INFO L225 Difference]: With dead ends: 103 [2020-09-15 13:48:42,061 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 13:48:42,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=534, Invalid=1536, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 13:48:42,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 13:48:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-09-15 13:48:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 13:48:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2020-09-15 13:48:42,064 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 24 [2020-09-15 13:48:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:42,064 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2020-09-15 13:48:42,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2020-09-15 13:48:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:42,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:42,065 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:42,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 13:48:42,276 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 68 times [2020-09-15 13:48:42,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:42,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216360834] [2020-09-15 13:48:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:42,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216360834] [2020-09-15 13:48:42,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384381453] [2020-09-15 13:48:42,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:42,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:42,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:42,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:42,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:42,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1311562631] [2020-09-15 13:48:42,628 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:42,630 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:42,637 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:42,637 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:42,640 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:42,640 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:42,684 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:42,684 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:42,696 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21583#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:42,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:42,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:42,698 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand 21 states. [2020-09-15 13:48:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:43,659 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-09-15 13:48:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:48:43,660 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:43,661 INFO L225 Difference]: With dead ends: 101 [2020-09-15 13:48:43,661 INFO L226 Difference]: Without dead ends: 95 [2020-09-15 13:48:43,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 13:48:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-15 13:48:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-09-15 13:48:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 13:48:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 194 transitions. [2020-09-15 13:48:43,665 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 194 transitions. Word has length 24 [2020-09-15 13:48:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:43,665 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 194 transitions. [2020-09-15 13:48:43,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 194 transitions. [2020-09-15 13:48:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:43,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:43,665 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:43,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:43,866 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 69 times [2020-09-15 13:48:43,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:43,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864610345] [2020-09-15 13:48:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:44,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864610345] [2020-09-15 13:48:44,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672548576] [2020-09-15 13:48:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:44,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-15 13:48:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:44,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:44,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:44,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970359858] [2020-09-15 13:48:44,204 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:44,206 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:44,212 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:44,212 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:44,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:44,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:44,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:44,286 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:44,297 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21982#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:48:44,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:44,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:44,298 INFO L87 Difference]: Start difference. First operand 77 states and 194 transitions. Second operand 21 states. [2020-09-15 13:48:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:45,352 INFO L93 Difference]: Finished difference Result 99 states and 240 transitions. [2020-09-15 13:48:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:48:45,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:45,354 INFO L225 Difference]: With dead ends: 99 [2020-09-15 13:48:45,354 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 13:48:45,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=682, Invalid=1768, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 13:48:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 13:48:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-09-15 13:48:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 13:48:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 200 transitions. [2020-09-15 13:48:45,357 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 200 transitions. Word has length 24 [2020-09-15 13:48:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:45,357 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 200 transitions. [2020-09-15 13:48:45,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 200 transitions. [2020-09-15 13:48:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:45,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:45,358 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:45,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:45,559 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 70 times [2020-09-15 13:48:45,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:45,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609940978] [2020-09-15 13:48:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:45,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609940978] [2020-09-15 13:48:45,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369883770] [2020-09-15 13:48:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:45,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:45,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:45,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:45,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:45,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152454525] [2020-09-15 13:48:45,911 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:45,913 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:45,918 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:45,918 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:45,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:45,920 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:45,962 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:45,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:45,973 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22387#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:48:45,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:45,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:45,974 INFO L87 Difference]: Start difference. First operand 79 states and 200 transitions. Second operand 21 states. [2020-09-15 13:48:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:47,120 INFO L93 Difference]: Finished difference Result 99 states and 243 transitions. [2020-09-15 13:48:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:48:47,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:47,122 INFO L225 Difference]: With dead ends: 99 [2020-09-15 13:48:47,122 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 13:48:47,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=780, Invalid=1872, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 13:48:47,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 13:48:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2020-09-15 13:48:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 13:48:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 208 transitions. [2020-09-15 13:48:47,126 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 208 transitions. Word has length 24 [2020-09-15 13:48:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:47,127 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 208 transitions. [2020-09-15 13:48:47,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 208 transitions. [2020-09-15 13:48:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-15 13:48:47,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:47,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:47,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:47,329 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:47,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 71 times [2020-09-15 13:48:47,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:47,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69981921] [2020-09-15 13:48:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:47,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69981921] [2020-09-15 13:48:47,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319112225] [2020-09-15 13:48:47,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:47,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-15 13:48:47,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:47,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-15 13:48:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:47,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:47,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-15 13:48:47,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077659111] [2020-09-15 13:48:47,700 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:47,702 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:47,708 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-09-15 13:48:47,708 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:47,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:47,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:47,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:47,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:47,764 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22800#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:48:47,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:48:47,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:47,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:48:47,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:48:47,766 INFO L87 Difference]: Start difference. First operand 81 states and 208 transitions. Second operand 21 states. [2020-09-15 13:48:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:48,964 INFO L93 Difference]: Finished difference Result 99 states and 251 transitions. [2020-09-15 13:48:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 13:48:48,965 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-15 13:48:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:48,966 INFO L225 Difference]: With dead ends: 99 [2020-09-15 13:48:48,966 INFO L226 Difference]: Without dead ends: 87 [2020-09-15 13:48:48,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=892, Invalid=1970, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 13:48:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-15 13:48:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-09-15 13:48:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-15 13:48:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-15 13:48:48,969 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2020-09-15 13:48:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:48,969 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-15 13:48:48,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:48:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-15 13:48:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:48,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:48,970 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:49,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-15 13:48:49,181 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 72 times [2020-09-15 13:48:49,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:49,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656865915] [2020-09-15 13:48:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:49,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656865915] [2020-09-15 13:48:49,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639031446] [2020-09-15 13:48:49,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:49,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 13:48:49,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:49,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:49,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:49,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [69066784] [2020-09-15 13:48:49,617 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:49,620 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:49,628 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 45 transitions. [2020-09-15 13:48:49,629 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:49,630 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,630 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,676 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,676 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,701 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,701 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,718 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,718 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,732 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,732 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,759 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:49,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:49,774 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23183#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:48:49,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:49,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:49,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:49,775 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 22 states. [2020-09-15 13:48:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:50,403 INFO L93 Difference]: Finished difference Result 96 states and 224 transitions. [2020-09-15 13:48:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:48:50,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:50,404 INFO L225 Difference]: With dead ends: 96 [2020-09-15 13:48:50,405 INFO L226 Difference]: Without dead ends: 90 [2020-09-15 13:48:50,405 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 [2020-09-15 13:48:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-15 13:48:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-15 13:48:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:48:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-15 13:48:50,408 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 25 [2020-09-15 13:48:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:50,409 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-15 13:48:50,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-15 13:48:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:50,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:50,410 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:50,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:50,621 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 73 times [2020-09-15 13:48:50,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:50,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524691405] [2020-09-15 13:48:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:50,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524691405] [2020-09-15 13:48:50,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828902680] [2020-09-15 13:48:50,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:51,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:51,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:51,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:51,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [980777718] [2020-09-15 13:48:51,060 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:51,062 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:51,068 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:51,068 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:51,070 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:51,070 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:51,117 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:51,117 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:51,127 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23551#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:48:51,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:51,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:51,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:51,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:51,128 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 22 states. [2020-09-15 13:48:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:51,894 INFO L93 Difference]: Finished difference Result 132 states and 298 transitions. [2020-09-15 13:48:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:48:51,895 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:51,896 INFO L225 Difference]: With dead ends: 132 [2020-09-15 13:48:51,896 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 13:48:51,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=1447, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 13:48:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 13:48:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2020-09-15 13:48:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-15 13:48:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2020-09-15 13:48:51,900 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 25 [2020-09-15 13:48:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:51,900 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2020-09-15 13:48:51,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2020-09-15 13:48:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:51,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:51,901 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:52,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:52,102 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:52,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 74 times [2020-09-15 13:48:52,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:52,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118061264] [2020-09-15 13:48:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:52,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118061264] [2020-09-15 13:48:52,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241656431] [2020-09-15 13:48:52,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:52,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:48:52,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:52,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:52,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:52,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:52,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [691068005] [2020-09-15 13:48:52,521 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:52,523 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:52,528 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:52,528 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:52,529 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:52,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:52,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:52,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:52,584 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23967#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:48:52,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:52,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:52,586 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand 22 states. [2020-09-15 13:48:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:53,429 INFO L93 Difference]: Finished difference Result 129 states and 294 transitions. [2020-09-15 13:48:53,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:48:53,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:53,431 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:48:53,431 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:48:53,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 13:48:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:48:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-09-15 13:48:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 13:48:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2020-09-15 13:48:53,434 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 25 [2020-09-15 13:48:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:53,434 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2020-09-15 13:48:53,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2020-09-15 13:48:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:53,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:53,435 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:53,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:53,636 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 75 times [2020-09-15 13:48:53,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:53,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37099787] [2020-09-15 13:48:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:53,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37099787] [2020-09-15 13:48:53,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671574714] [2020-09-15 13:48:53,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:54,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 13:48:54,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:54,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:54,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:54,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:54,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [893418594] [2020-09-15 13:48:54,041 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:54,044 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:54,051 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:54,051 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:54,051 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:54,051 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:54,094 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:54,095 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:54,106 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24388#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:48:54,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:54,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:54,107 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand 22 states. [2020-09-15 13:48:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:55,049 INFO L93 Difference]: Finished difference Result 127 states and 292 transitions. [2020-09-15 13:48:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:48:55,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:55,051 INFO L225 Difference]: With dead ends: 127 [2020-09-15 13:48:55,051 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 13:48:55,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=611, Invalid=1741, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 13:48:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 13:48:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-09-15 13:48:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 13:48:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2020-09-15 13:48:55,054 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 25 [2020-09-15 13:48:55,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:55,055 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2020-09-15 13:48:55,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2020-09-15 13:48:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:55,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:55,056 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:55,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 13:48:55,265 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:55,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 76 times [2020-09-15 13:48:55,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:55,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170496915] [2020-09-15 13:48:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:55,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170496915] [2020-09-15 13:48:55,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123854430] [2020-09-15 13:48:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:55,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:48:55,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:55,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:55,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:55,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:55,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:55,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1197189114] [2020-09-15 13:48:55,642 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:55,644 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:55,649 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:55,650 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:55,650 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:55,650 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:55,692 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:55,693 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:55,703 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24815#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:48:55,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:55,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:55,704 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand 22 states. [2020-09-15 13:48:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:56,711 INFO L93 Difference]: Finished difference Result 125 states and 290 transitions. [2020-09-15 13:48:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:48:56,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:56,713 INFO L225 Difference]: With dead ends: 125 [2020-09-15 13:48:56,713 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 13:48:56,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 13:48:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 13:48:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-09-15 13:48:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:48:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2020-09-15 13:48:56,716 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 25 [2020-09-15 13:48:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:56,716 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2020-09-15 13:48:56,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2020-09-15 13:48:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:56,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:56,717 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:56,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:56,926 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 77 times [2020-09-15 13:48:56,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:56,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818250037] [2020-09-15 13:48:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:57,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818250037] [2020-09-15 13:48:57,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755849932] [2020-09-15 13:48:57,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:57,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 13:48:57,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:57,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:57,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:57,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:57,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [903035492] [2020-09-15 13:48:57,327 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:57,329 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:57,334 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:57,334 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:57,337 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:57,337 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:57,379 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:57,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:57,389 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25248#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:48:57,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:57,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:57,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:57,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:57,390 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand 22 states. [2020-09-15 13:48:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:48:58,498 INFO L93 Difference]: Finished difference Result 123 states and 288 transitions. [2020-09-15 13:48:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:48:58,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:48:58,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:48:58,500 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:48:58,500 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:48:58,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 13:48:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:48:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-09-15 13:48:58,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 13:48:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 202 transitions. [2020-09-15 13:48:58,504 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 202 transitions. Word has length 25 [2020-09-15 13:48:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:48:58,504 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 202 transitions. [2020-09-15 13:48:58,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:48:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 202 transitions. [2020-09-15 13:48:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:48:58,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:48:58,505 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:48:58,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:48:58,706 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:48:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:48:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 78 times [2020-09-15 13:48:58,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:48:58,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774871626] [2020-09-15 13:48:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:48:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:48:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774871626] [2020-09-15 13:48:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820890534] [2020-09-15 13:48:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:48:59,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 13:48:59,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:48:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:48:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:48:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:48:59,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:48:59,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:48:59,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [671194243] [2020-09-15 13:48:59,089 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:48:59,091 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:48:59,097 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:48:59,097 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:48:59,099 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:59,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:59,141 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:48:59,142 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:48:59,152 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25687#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:48:59,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:48:59,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:48:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:48:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:48:59,153 INFO L87 Difference]: Start difference. First operand 80 states and 202 transitions. Second operand 22 states. [2020-09-15 13:49:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:00,350 INFO L93 Difference]: Finished difference Result 121 states and 286 transitions. [2020-09-15 13:49:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:49:00,351 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:49:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:00,352 INFO L225 Difference]: With dead ends: 121 [2020-09-15 13:49:00,352 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 13:49:00,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=848, Invalid=2122, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 13:49:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 13:49:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-09-15 13:49:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:49:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 208 transitions. [2020-09-15 13:49:00,356 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 208 transitions. Word has length 25 [2020-09-15 13:49:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:00,356 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 208 transitions. [2020-09-15 13:49:00,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:49:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 208 transitions. [2020-09-15 13:49:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:49:00,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:00,356 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:00,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-15 13:49:00,558 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 79 times [2020-09-15 13:49:00,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:00,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227525901] [2020-09-15 13:49:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:00,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227525901] [2020-09-15 13:49:00,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733633077] [2020-09-15 13:49:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:49:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:00,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:00,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:49:00,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1986818799] [2020-09-15 13:49:00,986 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:00,989 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:00,997 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:49:00,997 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:00,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:00,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:01,051 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:01,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:01,067 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26132#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:49:01,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:49:01,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:49:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:49:01,069 INFO L87 Difference]: Start difference. First operand 82 states and 208 transitions. Second operand 22 states. [2020-09-15 13:49:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:02,619 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-09-15 13:49:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:49:02,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:49:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:02,620 INFO L225 Difference]: With dead ends: 121 [2020-09-15 13:49:02,620 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 13:49:02,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=959, Invalid=2233, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:49:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 13:49:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-09-15 13:49:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 13:49:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 216 transitions. [2020-09-15 13:49:02,624 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 216 transitions. Word has length 25 [2020-09-15 13:49:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:02,624 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 216 transitions. [2020-09-15 13:49:02,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:49:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 216 transitions. [2020-09-15 13:49:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:49:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:02,626 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:02,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:02,836 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 80 times [2020-09-15 13:49:02,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:02,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479661928] [2020-09-15 13:49:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:03,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479661928] [2020-09-15 13:49:03,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989410468] [2020-09-15 13:49:03,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:03,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:49:03,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:49:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:03,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:03,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-15 13:49:03,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [390324375] [2020-09-15 13:49:03,213 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:03,215 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:03,222 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-09-15 13:49:03,223 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:03,246 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:03,246 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:03,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:03,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:03,294 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [26585#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:49:03,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-15 13:49:03,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:03,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-15 13:49:03,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:49:03,295 INFO L87 Difference]: Start difference. First operand 84 states and 216 transitions. Second operand 22 states. [2020-09-15 13:49:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:04,633 INFO L93 Difference]: Finished difference Result 122 states and 299 transitions. [2020-09-15 13:49:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 13:49:04,634 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-15 13:49:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:04,635 INFO L225 Difference]: With dead ends: 122 [2020-09-15 13:49:04,635 INFO L226 Difference]: Without dead ends: 110 [2020-09-15 13:49:04,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2338, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 13:49:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-15 13:49:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2020-09-15 13:49:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 13:49:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-15 13:49:04,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2020-09-15 13:49:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:04,639 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-15 13:49:04,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-15 13:49:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-15 13:49:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:04,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:04,639 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:04,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:04,840 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 81 times [2020-09-15 13:49:04,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:04,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45298589] [2020-09-15 13:49:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45298589] [2020-09-15 13:49:05,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582027149] [2020-09-15 13:49:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:05,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 13:49:05,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:05,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:05,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:05,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1763172238] [2020-09-15 13:49:05,316 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:05,318 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:05,325 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2020-09-15 13:49:05,325 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:05,325 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:05,326 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:05,372 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:05,372 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:05,386 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27011#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:49:05,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:05,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:05,387 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 23 states. [2020-09-15 13:49:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:06,111 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2020-09-15 13:49:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 13:49:06,112 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:06,113 INFO L225 Difference]: With dead ends: 118 [2020-09-15 13:49:06,113 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 13:49:06,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 13:49:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 13:49:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-09-15 13:49:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-15 13:49:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 180 transitions. [2020-09-15 13:49:06,116 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 180 transitions. Word has length 26 [2020-09-15 13:49:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:06,116 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 180 transitions. [2020-09-15 13:49:06,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 180 transitions. [2020-09-15 13:49:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:06,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:06,117 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:06,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:06,318 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:06,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 82 times [2020-09-15 13:49:06,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:06,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592403874] [2020-09-15 13:49:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:06,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592403874] [2020-09-15 13:49:06,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29589455] [2020-09-15 13:49:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:06,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:49:06,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:06,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:06,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:06,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706554421] [2020-09-15 13:49:06,776 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:06,778 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:06,784 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:06,785 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:06,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:06,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:06,832 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:06,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:06,845 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27415#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:49:06,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:06,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:06,846 INFO L87 Difference]: Start difference. First operand 73 states and 180 transitions. Second operand 23 states. [2020-09-15 13:49:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:07,668 INFO L93 Difference]: Finished difference Result 115 states and 266 transitions. [2020-09-15 13:49:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:49:07,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:07,670 INFO L225 Difference]: With dead ends: 115 [2020-09-15 13:49:07,670 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 13:49:07,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 13:49:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 13:49:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 75. [2020-09-15 13:49:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-15 13:49:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 186 transitions. [2020-09-15 13:49:07,673 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 186 transitions. Word has length 26 [2020-09-15 13:49:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:07,674 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 186 transitions. [2020-09-15 13:49:07,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 186 transitions. [2020-09-15 13:49:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:07,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:07,675 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:07,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:07,884 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 83 times [2020-09-15 13:49:07,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:07,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314008406] [2020-09-15 13:49:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:08,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314008406] [2020-09-15 13:49:08,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364329908] [2020-09-15 13:49:08,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:08,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 13:49:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:08,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:08,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:08,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1589678790] [2020-09-15 13:49:08,342 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:08,344 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:08,349 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:08,349 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:08,350 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:08,350 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:08,394 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:08,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:08,409 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27824#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:49:08,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:08,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:08,410 INFO L87 Difference]: Start difference. First operand 75 states and 186 transitions. Second operand 23 states. [2020-09-15 13:49:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:09,328 INFO L93 Difference]: Finished difference Result 113 states and 264 transitions. [2020-09-15 13:49:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:49:09,329 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:09,330 INFO L225 Difference]: With dead ends: 113 [2020-09-15 13:49:09,330 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 13:49:09,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 13:49:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 13:49:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2020-09-15 13:49:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 13:49:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 192 transitions. [2020-09-15 13:49:09,334 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 192 transitions. Word has length 26 [2020-09-15 13:49:09,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:09,334 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 192 transitions. [2020-09-15 13:49:09,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 192 transitions. [2020-09-15 13:49:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:09,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:09,335 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:09,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:09,547 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 84 times [2020-09-15 13:49:09,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:09,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596816679] [2020-09-15 13:49:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596816679] [2020-09-15 13:49:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253815841] [2020-09-15 13:49:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:09,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-15 13:49:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:09,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:09,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:09,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1133246922] [2020-09-15 13:49:09,991 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:09,993 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:10,000 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:10,000 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:10,002 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:10,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:10,053 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:10,054 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:10,065 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28239#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:49:10,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:10,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:10,066 INFO L87 Difference]: Start difference. First operand 77 states and 192 transitions. Second operand 23 states. [2020-09-15 13:49:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:11,077 INFO L93 Difference]: Finished difference Result 111 states and 262 transitions. [2020-09-15 13:49:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:49:11,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:11,079 INFO L225 Difference]: With dead ends: 111 [2020-09-15 13:49:11,079 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 13:49:11,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 13:49:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 13:49:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-09-15 13:49:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 13:49:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 198 transitions. [2020-09-15 13:49:11,082 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 198 transitions. Word has length 26 [2020-09-15 13:49:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:11,083 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 198 transitions. [2020-09-15 13:49:11,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 198 transitions. [2020-09-15 13:49:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:11,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:11,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:11,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:11,285 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 85 times [2020-09-15 13:49:11,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:11,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330249420] [2020-09-15 13:49:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:11,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330249420] [2020-09-15 13:49:11,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902197845] [2020-09-15 13:49:11,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:11,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:11,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:11,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:11,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [346277085] [2020-09-15 13:49:11,726 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:11,729 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:11,737 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:11,737 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:11,740 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:11,740 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:11,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:11,786 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:11,802 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28660#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:49:11,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:11,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:11,803 INFO L87 Difference]: Start difference. First operand 79 states and 198 transitions. Second operand 23 states. [2020-09-15 13:49:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:12,887 INFO L93 Difference]: Finished difference Result 109 states and 260 transitions. [2020-09-15 13:49:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:49:12,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:12,889 INFO L225 Difference]: With dead ends: 109 [2020-09-15 13:49:12,889 INFO L226 Difference]: Without dead ends: 103 [2020-09-15 13:49:12,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 13:49:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-15 13:49:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2020-09-15 13:49:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 13:49:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 204 transitions. [2020-09-15 13:49:12,892 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 204 transitions. Word has length 26 [2020-09-15 13:49:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:12,892 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 204 transitions. [2020-09-15 13:49:12,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:12,892 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 204 transitions. [2020-09-15 13:49:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:12,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:12,893 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:13,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-15 13:49:13,094 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 86 times [2020-09-15 13:49:13,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:13,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920856229] [2020-09-15 13:49:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:13,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920856229] [2020-09-15 13:49:13,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994689496] [2020-09-15 13:49:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:13,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:49:13,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:13,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:13,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:13,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:13,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:13,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1432189919] [2020-09-15 13:49:13,499 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:13,502 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:13,510 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:13,510 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:13,513 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:13,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:13,554 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:13,554 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:13,564 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29087#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:49:13,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:13,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:13,565 INFO L87 Difference]: Start difference. First operand 81 states and 204 transitions. Second operand 23 states. [2020-09-15 13:49:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:14,781 INFO L93 Difference]: Finished difference Result 107 states and 258 transitions. [2020-09-15 13:49:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:49:14,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:14,783 INFO L225 Difference]: With dead ends: 107 [2020-09-15 13:49:14,783 INFO L226 Difference]: Without dead ends: 101 [2020-09-15 13:49:14,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=767, Invalid=2095, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 13:49:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-15 13:49:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-09-15 13:49:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 13:49:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 210 transitions. [2020-09-15 13:49:14,789 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 210 transitions. Word has length 26 [2020-09-15 13:49:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:14,789 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 210 transitions. [2020-09-15 13:49:14,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 210 transitions. [2020-09-15 13:49:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:14,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:14,790 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:14,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:15,000 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 87 times [2020-09-15 13:49:15,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:15,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680470508] [2020-09-15 13:49:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:15,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680470508] [2020-09-15 13:49:15,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654365627] [2020-09-15 13:49:15,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:15,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 13:49:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:15,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:15,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:15,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:15,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1794558753] [2020-09-15 13:49:15,476 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:15,481 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:15,493 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:15,494 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:15,499 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:15,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:15,556 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:15,557 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:15,569 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29520#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:49:15,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:15,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:15,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:15,570 INFO L87 Difference]: Start difference. First operand 83 states and 210 transitions. Second operand 23 states. [2020-09-15 13:49:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:16,952 INFO L93 Difference]: Finished difference Result 105 states and 256 transitions. [2020-09-15 13:49:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:49:16,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:16,954 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:49:16,954 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:49:16,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=863, Invalid=2217, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 13:49:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:49:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2020-09-15 13:49:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 13:49:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-09-15 13:49:16,957 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 26 [2020-09-15 13:49:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:16,958 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-09-15 13:49:16,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-09-15 13:49:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:16,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:16,958 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:17,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 13:49:17,167 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 88 times [2020-09-15 13:49:17,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:17,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262614880] [2020-09-15 13:49:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:17,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262614880] [2020-09-15 13:49:17,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095247103] [2020-09-15 13:49:17,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:17,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:49:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:17,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:17,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:17,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [305798332] [2020-09-15 13:49:17,577 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:17,579 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:17,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:17,585 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:17,587 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:17,587 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:17,631 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:17,631 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:17,642 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29959#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:49:17,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:17,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:17,643 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 23 states. [2020-09-15 13:49:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:19,032 INFO L93 Difference]: Finished difference Result 105 states and 259 transitions. [2020-09-15 13:49:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:49:19,033 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:19,034 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:49:19,034 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:49:19,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=975, Invalid=2331, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 13:49:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:49:19,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-09-15 13:49:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 13:49:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 224 transitions. [2020-09-15 13:49:19,038 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 224 transitions. Word has length 26 [2020-09-15 13:49:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:19,038 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 224 transitions. [2020-09-15 13:49:19,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 224 transitions. [2020-09-15 13:49:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-15 13:49:19,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:19,039 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:19,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-15 13:49:19,242 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:19,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 89 times [2020-09-15 13:49:19,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:19,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403830166] [2020-09-15 13:49:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:19,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403830166] [2020-09-15 13:49:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37148162] [2020-09-15 13:49:19,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:19,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-15 13:49:19,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-15 13:49:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:19,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:19,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-15 13:49:19,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [563289656] [2020-09-15 13:49:19,636 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:19,638 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:19,643 INFO L274 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-09-15 13:49:19,643 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:19,645 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:19,645 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:19,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:19,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:19,699 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30406#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:49:19,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:49:19,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:49:19,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:49:19,700 INFO L87 Difference]: Start difference. First operand 87 states and 224 transitions. Second operand 23 states. [2020-09-15 13:49:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:21,132 INFO L93 Difference]: Finished difference Result 105 states and 267 transitions. [2020-09-15 13:49:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-15 13:49:21,133 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-15 13:49:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:21,134 INFO L225 Difference]: With dead ends: 105 [2020-09-15 13:49:21,134 INFO L226 Difference]: Without dead ends: 93 [2020-09-15 13:49:21,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1101, Invalid=2439, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 13:49:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-15 13:49:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-09-15 13:49:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 13:49:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-15 13:49:21,137 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2020-09-15 13:49:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:21,137 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-15 13:49:21,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:49:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-15 13:49:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:21,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:21,138 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:21,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:21,339 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:21,340 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 90 times [2020-09-15 13:49:21,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:21,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018327836] [2020-09-15 13:49:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:21,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018327836] [2020-09-15 13:49:21,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631618278] [2020-09-15 13:49:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:21,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 13:49:21,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:21,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:21,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:21,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1342981377] [2020-09-15 13:49:21,838 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:21,841 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:21,849 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2020-09-15 13:49:21,849 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:21,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,852 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,910 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,954 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,954 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,978 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,979 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,987 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:21,987 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:21,995 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30819#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:49:21,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:21,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:21,996 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 24 states. [2020-09-15 13:49:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:22,874 INFO L93 Difference]: Finished difference Result 102 states and 238 transitions. [2020-09-15 13:49:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:49:22,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:22,877 INFO L225 Difference]: With dead ends: 102 [2020-09-15 13:49:22,877 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 13:49:22,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=1403, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 13:49:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 13:49:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-15 13:49:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 13:49:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-15 13:49:22,881 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 27 [2020-09-15 13:49:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:22,881 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-15 13:49:22,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-15 13:49:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:22,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:22,882 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:23,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:23,094 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 91 times [2020-09-15 13:49:23,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:23,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223598440] [2020-09-15 13:49:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:23,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223598440] [2020-09-15 13:49:23,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593138553] [2020-09-15 13:49:23,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:23,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:23,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:23,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:23,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535421739] [2020-09-15 13:49:23,540 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:23,545 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:23,553 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:23,554 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:23,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:23,558 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:23,602 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:23,602 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:23,611 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31213#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:49:23,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:23,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:23,612 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 24 states. [2020-09-15 13:49:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:24,474 INFO L93 Difference]: Finished difference Result 142 states and 320 transitions. [2020-09-15 13:49:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:49:24,475 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:24,477 INFO L225 Difference]: With dead ends: 142 [2020-09-15 13:49:24,477 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 13:49:24,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1716, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 13:49:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 13:49:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 76. [2020-09-15 13:49:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 13:49:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 188 transitions. [2020-09-15 13:49:24,480 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 188 transitions. Word has length 27 [2020-09-15 13:49:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:24,480 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 188 transitions. [2020-09-15 13:49:24,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 188 transitions. [2020-09-15 13:49:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:24,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:24,481 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:24,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:24,682 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 92 times [2020-09-15 13:49:24,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:24,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994589889] [2020-09-15 13:49:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:25,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994589889] [2020-09-15 13:49:25,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458044518] [2020-09-15 13:49:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:25,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:49:25,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:25,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:25,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:25,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:25,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [676303450] [2020-09-15 13:49:25,153 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:25,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:25,165 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:25,165 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:25,168 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:25,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:25,219 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:25,219 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:25,229 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31659#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:49:25,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:25,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:25,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:25,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:25,230 INFO L87 Difference]: Start difference. First operand 76 states and 188 transitions. Second operand 24 states. [2020-09-15 13:49:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:26,209 INFO L93 Difference]: Finished difference Result 139 states and 316 transitions. [2020-09-15 13:49:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:49:26,210 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:26,211 INFO L225 Difference]: With dead ends: 139 [2020-09-15 13:49:26,211 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 13:49:26,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=1885, Unknown=0, NotChecked=0, Total=2550 [2020-09-15 13:49:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 13:49:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-09-15 13:49:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:49:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 194 transitions. [2020-09-15 13:49:26,214 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 194 transitions. Word has length 27 [2020-09-15 13:49:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:26,214 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 194 transitions. [2020-09-15 13:49:26,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 194 transitions. [2020-09-15 13:49:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:26,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:26,215 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:26,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-15 13:49:26,416 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 93 times [2020-09-15 13:49:26,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:26,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488221533] [2020-09-15 13:49:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:26,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488221533] [2020-09-15 13:49:26,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477434801] [2020-09-15 13:49:26,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:26,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 13:49:26,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:26,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:26,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:26,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:26,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834766756] [2020-09-15 13:49:26,882 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:26,884 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:26,891 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:26,891 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:26,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:26,894 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:26,933 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:26,934 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:26,943 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32110#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:49:26,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:26,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:26,944 INFO L87 Difference]: Start difference. First operand 78 states and 194 transitions. Second operand 24 states. [2020-09-15 13:49:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:27,987 INFO L93 Difference]: Finished difference Result 137 states and 314 transitions. [2020-09-15 13:49:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:49:27,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:27,989 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:49:27,989 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:49:27,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 13:49:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:49:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-09-15 13:49:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 13:49:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 200 transitions. [2020-09-15 13:49:27,992 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 200 transitions. Word has length 27 [2020-09-15 13:49:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:27,993 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 200 transitions. [2020-09-15 13:49:27,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 200 transitions. [2020-09-15 13:49:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:27,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:27,993 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:28,194 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:28,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 94 times [2020-09-15 13:49:28,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:28,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520939662] [2020-09-15 13:49:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:28,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520939662] [2020-09-15 13:49:28,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171683985] [2020-09-15 13:49:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:28,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:49:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:28,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:28,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:28,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881707338] [2020-09-15 13:49:28,643 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:28,646 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:28,653 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:28,653 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:28,663 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:28,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:28,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:28,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:28,712 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32567#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:49:28,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:28,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:28,713 INFO L87 Difference]: Start difference. First operand 80 states and 200 transitions. Second operand 24 states. [2020-09-15 13:49:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:30,044 INFO L93 Difference]: Finished difference Result 135 states and 312 transitions. [2020-09-15 13:49:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:49:30,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:30,046 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:49:30,046 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:49:30,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=2199, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 13:49:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:49:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2020-09-15 13:49:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:49:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-09-15 13:49:30,050 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 27 [2020-09-15 13:49:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:30,050 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-09-15 13:49:30,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-09-15 13:49:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:30,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:30,051 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:30,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-15 13:49:30,252 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 95 times [2020-09-15 13:49:30,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:30,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241526790] [2020-09-15 13:49:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:30,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241526790] [2020-09-15 13:49:30,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663882768] [2020-09-15 13:49:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:30,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 13:49:30,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:30,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:30,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:30,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:30,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [329952443] [2020-09-15 13:49:30,685 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:30,686 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:30,692 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:30,693 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:30,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:30,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:30,749 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:30,749 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:30,759 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33030#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:49:30,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:30,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:30,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:30,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:30,760 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 24 states. [2020-09-15 13:49:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:31,987 INFO L93 Difference]: Finished difference Result 133 states and 310 transitions. [2020-09-15 13:49:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:49:31,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:31,988 INFO L225 Difference]: With dead ends: 133 [2020-09-15 13:49:31,988 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 13:49:31,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=848, Invalid=2344, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:49:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 13:49:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-09-15 13:49:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 13:49:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-09-15 13:49:31,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 27 [2020-09-15 13:49:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:31,994 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-09-15 13:49:31,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-09-15 13:49:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:31,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:31,995 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:32,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:32,205 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 96 times [2020-09-15 13:49:32,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:32,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428542944] [2020-09-15 13:49:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:32,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428542944] [2020-09-15 13:49:32,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977415055] [2020-09-15 13:49:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:32,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 13:49:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:32,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:32,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:32,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:32,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:32,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [378341744] [2020-09-15 13:49:32,646 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:32,648 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:32,653 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:32,653 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:32,654 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:32,654 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:32,699 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:32,700 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:32,711 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33499#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:49:32,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:32,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:32,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:32,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:32,712 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 24 states. [2020-09-15 13:49:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:34,039 INFO L93 Difference]: Finished difference Result 131 states and 308 transitions. [2020-09-15 13:49:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:49:34,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:34,041 INFO L225 Difference]: With dead ends: 131 [2020-09-15 13:49:34,041 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 13:49:34,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=2481, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 13:49:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 13:49:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-15 13:49:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:49:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 218 transitions. [2020-09-15 13:49:34,045 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 218 transitions. Word has length 27 [2020-09-15 13:49:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:34,045 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 218 transitions. [2020-09-15 13:49:34,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 218 transitions. [2020-09-15 13:49:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:34,046 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:34,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:34,255 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 97 times [2020-09-15 13:49:34,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:34,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105728476] [2020-09-15 13:49:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:34,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105728476] [2020-09-15 13:49:34,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752008743] [2020-09-15 13:49:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:34,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:34,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:34,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:34,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1894891218] [2020-09-15 13:49:34,668 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:34,670 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:34,675 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:34,675 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:34,677 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:34,678 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:34,720 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:34,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:34,729 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33974#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:49:34,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:34,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:34,730 INFO L87 Difference]: Start difference. First operand 86 states and 218 transitions. Second operand 24 states. [2020-09-15 13:49:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:36,148 INFO L93 Difference]: Finished difference Result 129 states and 306 transitions. [2020-09-15 13:49:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:49:36,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:36,150 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:49:36,150 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:49:36,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1050, Invalid=2610, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:49:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:49:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-09-15 13:49:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 13:49:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 224 transitions. [2020-09-15 13:49:36,153 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 224 transitions. Word has length 27 [2020-09-15 13:49:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:36,153 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 224 transitions. [2020-09-15 13:49:36,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 224 transitions. [2020-09-15 13:49:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:36,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:36,154 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:36,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-15 13:49:36,358 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 98 times [2020-09-15 13:49:36,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:36,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980239017] [2020-09-15 13:49:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:36,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980239017] [2020-09-15 13:49:36,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343653380] [2020-09-15 13:49:36,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:36,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:49:36,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:36,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:36,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:36,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:36,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1007011727] [2020-09-15 13:49:36,785 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:36,787 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:36,792 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:36,792 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:36,793 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:36,793 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:36,840 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:36,841 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:36,851 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34455#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:49:36,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:36,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:36,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:36,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:36,852 INFO L87 Difference]: Start difference. First operand 88 states and 224 transitions. Second operand 24 states. [2020-09-15 13:49:38,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:38,347 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-15 13:49:38,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:49:38,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:38,349 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:49:38,349 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:49:38,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1175, Invalid=2731, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:49:38,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:49:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-09-15 13:49:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:49:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 232 transitions. [2020-09-15 13:49:38,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 232 transitions. Word has length 27 [2020-09-15 13:49:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:38,353 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 232 transitions. [2020-09-15 13:49:38,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 232 transitions. [2020-09-15 13:49:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-15 13:49:38,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:38,353 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:38,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-15 13:49:38,558 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 99 times [2020-09-15 13:49:38,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:38,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926019819] [2020-09-15 13:49:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:38,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926019819] [2020-09-15 13:49:38,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873559480] [2020-09-15 13:49:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:38,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 13:49:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-15 13:49:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:38,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:38,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-15 13:49:38,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [870508526] [2020-09-15 13:49:38,976 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:38,978 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:38,983 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-09-15 13:49:38,984 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:38,986 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:38,986 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:39,036 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:39,036 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:39,046 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34944#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:49:39,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-15 13:49:39,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-15 13:49:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:49:39,047 INFO L87 Difference]: Start difference. First operand 90 states and 232 transitions. Second operand 24 states. [2020-09-15 13:49:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:40,618 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-15 13:49:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 13:49:40,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-15 13:49:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:40,620 INFO L225 Difference]: With dead ends: 130 [2020-09-15 13:49:40,620 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 13:49:40,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1314, Invalid=2846, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:49:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 13:49:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2020-09-15 13:49:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:49:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-15 13:49:40,624 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2020-09-15 13:49:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:40,624 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-15 13:49:40,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-15 13:49:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-15 13:49:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:40,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:40,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:40,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:40,829 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 100 times [2020-09-15 13:49:40,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:40,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584292578] [2020-09-15 13:49:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:41,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584292578] [2020-09-15 13:49:41,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262636952] [2020-09-15 13:49:41,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:41,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:49:41,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:41,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:41,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:41,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:41,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222867625] [2020-09-15 13:49:41,374 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:41,376 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:41,381 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2020-09-15 13:49:41,381 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:41,382 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:41,382 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:41,431 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:41,432 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:41,447 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35402#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:49:41,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:41,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:41,448 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 25 states. [2020-09-15 13:49:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:42,280 INFO L93 Difference]: Finished difference Result 126 states and 288 transitions. [2020-09-15 13:49:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 13:49:42,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:42,282 INFO L225 Difference]: With dead ends: 126 [2020-09-15 13:49:42,282 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 13:49:42,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 13:49:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 13:49:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 77. [2020-09-15 13:49:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-15 13:49:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-15 13:49:42,286 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 28 [2020-09-15 13:49:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:42,286 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-15 13:49:42,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-15 13:49:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:42,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:42,287 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:42,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 13:49:42,492 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 101 times [2020-09-15 13:49:42,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:42,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69736468] [2020-09-15 13:49:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:42,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69736468] [2020-09-15 13:49:42,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844871775] [2020-09-15 13:49:42,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:42,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 13:49:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:43,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:43,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:43,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1197344037] [2020-09-15 13:49:43,016 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:43,018 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:43,025 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:43,025 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:43,026 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:43,026 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:43,067 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:43,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:43,080 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35834#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:49:43,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:43,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:43,081 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 25 states. [2020-09-15 13:49:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:43,999 INFO L93 Difference]: Finished difference Result 123 states and 284 transitions. [2020-09-15 13:49:44,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:49:44,000 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:44,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:44,001 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:49:44,001 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:49:44,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 13:49:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:49:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-15 13:49:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 13:49:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 196 transitions. [2020-09-15 13:49:44,005 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 196 transitions. Word has length 28 [2020-09-15 13:49:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:44,005 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 196 transitions. [2020-09-15 13:49:44,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 196 transitions. [2020-09-15 13:49:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:44,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:44,005 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:44,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-15 13:49:44,206 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 102 times [2020-09-15 13:49:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:44,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436654042] [2020-09-15 13:49:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:44,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436654042] [2020-09-15 13:49:44,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383786570] [2020-09-15 13:49:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:44,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 13:49:44,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:44,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:44,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:44,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:44,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2087037229] [2020-09-15 13:49:44,713 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:44,715 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:44,721 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:44,721 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:44,723 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:44,723 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:44,771 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:44,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:44,786 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36271#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:49:44,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:44,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:44,787 INFO L87 Difference]: Start difference. First operand 79 states and 196 transitions. Second operand 25 states. [2020-09-15 13:49:45,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:45,804 INFO L93 Difference]: Finished difference Result 121 states and 282 transitions. [2020-09-15 13:49:45,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:49:45,804 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:45,805 INFO L225 Difference]: With dead ends: 121 [2020-09-15 13:49:45,805 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 13:49:45,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=676, Invalid=1976, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 13:49:45,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 13:49:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-15 13:49:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 13:49:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-09-15 13:49:45,808 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 28 [2020-09-15 13:49:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:45,809 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-09-15 13:49:45,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-09-15 13:49:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:45,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:45,809 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:46,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 13:49:46,010 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:46,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 103 times [2020-09-15 13:49:46,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:46,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798919757] [2020-09-15 13:49:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798919757] [2020-09-15 13:49:46,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637461057] [2020-09-15 13:49:46,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:46,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:46,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:46,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252735350] [2020-09-15 13:49:46,499 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:46,501 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:46,506 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:46,506 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:46,507 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:46,507 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:46,553 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:46,553 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:46,565 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [36714#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:49:46,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:46,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:46,566 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 25 states. [2020-09-15 13:49:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:47,715 INFO L93 Difference]: Finished difference Result 119 states and 280 transitions. [2020-09-15 13:49:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:49:47,716 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:47,716 INFO L225 Difference]: With dead ends: 119 [2020-09-15 13:49:47,716 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 13:49:47,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 13:49:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 13:49:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-15 13:49:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 13:49:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 208 transitions. [2020-09-15 13:49:47,719 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 208 transitions. Word has length 28 [2020-09-15 13:49:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:47,719 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 208 transitions. [2020-09-15 13:49:47,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 208 transitions. [2020-09-15 13:49:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:47,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:47,720 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:47,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:47,928 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 104 times [2020-09-15 13:49:47,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:47,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766419799] [2020-09-15 13:49:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:48,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766419799] [2020-09-15 13:49:48,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907759502] [2020-09-15 13:49:48,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:48,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:49:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:48,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:48,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:48,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155625940] [2020-09-15 13:49:48,401 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:48,403 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:48,409 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:48,410 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:48,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:48,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:48,454 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:48,455 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:48,467 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37163#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:49:48,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:48,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:48,468 INFO L87 Difference]: Start difference. First operand 83 states and 208 transitions. Second operand 25 states. [2020-09-15 13:49:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:49,698 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-15 13:49:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:49:49,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:49,700 INFO L225 Difference]: With dead ends: 117 [2020-09-15 13:49:49,700 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 13:49:49,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 13:49:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 13:49:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2020-09-15 13:49:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 13:49:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 214 transitions. [2020-09-15 13:49:49,704 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 214 transitions. Word has length 28 [2020-09-15 13:49:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:49,704 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 214 transitions. [2020-09-15 13:49:49,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 214 transitions. [2020-09-15 13:49:49,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:49,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:49,705 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:49,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 13:49:49,915 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 105 times [2020-09-15 13:49:49,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:49,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138067598] [2020-09-15 13:49:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:50,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138067598] [2020-09-15 13:49:50,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975853324] [2020-09-15 13:49:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:50,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-15 13:49:50,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:50,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:50,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:50,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1393762613] [2020-09-15 13:49:50,385 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:50,387 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:50,392 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:50,393 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:50,394 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:50,394 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:50,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:50,441 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:50,459 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37618#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:49:50,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:50,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:50,460 INFO L87 Difference]: Start difference. First operand 85 states and 214 transitions. Second operand 25 states. [2020-09-15 13:49:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:51,810 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-09-15 13:49:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:49:51,811 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:51,812 INFO L225 Difference]: With dead ends: 115 [2020-09-15 13:49:51,812 INFO L226 Difference]: Without dead ends: 109 [2020-09-15 13:49:51,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=862, Invalid=2444, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 13:49:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-15 13:49:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2020-09-15 13:49:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 13:49:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 220 transitions. [2020-09-15 13:49:51,815 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 220 transitions. Word has length 28 [2020-09-15 13:49:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:51,816 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 220 transitions. [2020-09-15 13:49:51,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 220 transitions. [2020-09-15 13:49:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:51,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:51,816 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:52,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-15 13:49:52,017 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 106 times [2020-09-15 13:49:52,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:52,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617911018] [2020-09-15 13:49:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:52,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617911018] [2020-09-15 13:49:52,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697744389] [2020-09-15 13:49:52,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:52,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:49:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:52,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:52,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:52,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786339747] [2020-09-15 13:49:52,478 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:52,479 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:52,485 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:52,485 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:52,486 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:52,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:52,532 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:52,532 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:52,543 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38079#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:49:52,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:52,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:52,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:52,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:52,545 INFO L87 Difference]: Start difference. First operand 87 states and 220 transitions. Second operand 25 states. [2020-09-15 13:49:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:53,985 INFO L93 Difference]: Finished difference Result 113 states and 274 transitions. [2020-09-15 13:49:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:49:53,986 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:53,987 INFO L225 Difference]: With dead ends: 113 [2020-09-15 13:49:53,987 INFO L226 Difference]: Without dead ends: 107 [2020-09-15 13:49:53,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=956, Invalid=2584, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 13:49:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-15 13:49:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-09-15 13:49:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 13:49:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 226 transitions. [2020-09-15 13:49:53,990 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 226 transitions. Word has length 28 [2020-09-15 13:49:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:53,990 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 226 transitions. [2020-09-15 13:49:53,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 226 transitions. [2020-09-15 13:49:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:53,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:53,991 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:54,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 13:49:54,192 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 107 times [2020-09-15 13:49:54,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:54,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372779990] [2020-09-15 13:49:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372779990] [2020-09-15 13:49:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934716297] [2020-09-15 13:49:54,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:54,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-15 13:49:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:54,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:54,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:54,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366077938] [2020-09-15 13:49:54,651 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:54,652 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:54,658 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:54,658 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:54,658 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:54,659 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:54,727 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:54,727 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:54,740 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38546#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:49:54,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:54,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:54,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:54,742 INFO L87 Difference]: Start difference. First operand 89 states and 226 transitions. Second operand 25 states. [2020-09-15 13:49:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:56,289 INFO L93 Difference]: Finished difference Result 111 states and 272 transitions. [2020-09-15 13:49:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:49:56,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:56,291 INFO L225 Difference]: With dead ends: 111 [2020-09-15 13:49:56,291 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 13:49:56,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1066, Invalid=2716, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 13:49:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 13:49:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-15 13:49:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 13:49:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 232 transitions. [2020-09-15 13:49:56,294 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 232 transitions. Word has length 28 [2020-09-15 13:49:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:56,294 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 232 transitions. [2020-09-15 13:49:56,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 232 transitions. [2020-09-15 13:49:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:56,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:56,295 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:56,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:56,496 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:56,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:56,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 108 times [2020-09-15 13:49:56,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:56,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180256338] [2020-09-15 13:49:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180256338] [2020-09-15 13:49:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298253628] [2020-09-15 13:49:56,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:56,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-15 13:49:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:49:56,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:56,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:56,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:56,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:56,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117918090] [2020-09-15 13:49:56,966 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:56,968 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:56,975 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:56,976 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:56,978 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:56,978 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:57,014 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:57,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:57,024 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39019#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:49:57,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:57,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:57,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:57,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:57,026 INFO L87 Difference]: Start difference. First operand 91 states and 232 transitions. Second operand 25 states. [2020-09-15 13:49:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:49:58,691 INFO L93 Difference]: Finished difference Result 111 states and 275 transitions. [2020-09-15 13:49:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:49:58,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:49:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:49:58,693 INFO L225 Difference]: With dead ends: 111 [2020-09-15 13:49:58,693 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 13:49:58,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1192, Invalid=2840, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 13:49:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 13:49:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2020-09-15 13:49:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 13:49:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 240 transitions. [2020-09-15 13:49:58,695 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 240 transitions. Word has length 28 [2020-09-15 13:49:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:49:58,695 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 240 transitions. [2020-09-15 13:49:58,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:49:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 240 transitions. [2020-09-15 13:49:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:49:58,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:49:58,696 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:49:58,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:49:58,897 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:49:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:49:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 109 times [2020-09-15 13:49:58,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:49:58,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208942460] [2020-09-15 13:49:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:49:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:59,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208942460] [2020-09-15 13:49:59,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718162267] [2020-09-15 13:49:59,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:49:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:49:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-15 13:49:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:49:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:49:59,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:49:59,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-15 13:49:59,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [709589346] [2020-09-15 13:49:59,353 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:49:59,355 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:49:59,361 INFO L274 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-09-15 13:49:59,361 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:49:59,362 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:59,362 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:59,411 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:49:59,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:49:59,422 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39500#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:49:59,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:49:59,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:49:59,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:49:59,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:49:59,423 INFO L87 Difference]: Start difference. First operand 93 states and 240 transitions. Second operand 25 states. [2020-09-15 13:50:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:01,110 INFO L93 Difference]: Finished difference Result 111 states and 283 transitions. [2020-09-15 13:50:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-15 13:50:01,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-15 13:50:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:01,112 INFO L225 Difference]: With dead ends: 111 [2020-09-15 13:50:01,112 INFO L226 Difference]: Without dead ends: 99 [2020-09-15 13:50:01,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1332, Invalid=2958, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 13:50:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-15 13:50:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2020-09-15 13:50:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:50:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-15 13:50:01,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2020-09-15 13:50:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:01,114 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-15 13:50:01,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:50:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-15 13:50:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:01,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:01,115 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:01,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:01,322 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 110 times [2020-09-15 13:50:01,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:01,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465370686] [2020-09-15 13:50:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:01,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465370686] [2020-09-15 13:50:01,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143877593] [2020-09-15 13:50:01,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:01,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:50:01,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:01,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:01,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:01,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1672408620] [2020-09-15 13:50:01,909 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:01,910 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:01,917 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 49 transitions. [2020-09-15 13:50:01,917 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:01,919 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:01,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:01,957 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:01,958 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:01,989 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:01,990 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,002 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:02,002 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,013 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:02,013 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,017 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:02,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,044 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:02,045 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,056 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:02,056 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:02,063 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39943#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:50:02,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:02,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:02,064 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 26 states. [2020-09-15 13:50:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:02,983 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2020-09-15 13:50:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:50:02,984 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:02,985 INFO L225 Difference]: With dead ends: 108 [2020-09-15 13:50:02,985 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 13:50:02,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=688, Invalid=1664, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 13:50:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 13:50:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-15 13:50:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:50:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-15 13:50:02,988 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 29 [2020-09-15 13:50:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-15 13:50:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-15 13:50:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:02,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:02,988 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:03,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 13:50:03,189 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 111 times [2020-09-15 13:50:03,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:03,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074962411] [2020-09-15 13:50:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:03,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074962411] [2020-09-15 13:50:03,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224747250] [2020-09-15 13:50:03,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:03,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 13:50:03,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:03,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:03,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:03,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:03,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525619247] [2020-09-15 13:50:03,746 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:03,748 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:03,754 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:03,754 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:03,756 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:03,756 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:03,808 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:03,808 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:03,817 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40363#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:50:03,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:03,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:03,819 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 26 states. [2020-09-15 13:50:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:04,827 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2020-09-15 13:50:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:50:04,828 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:04,829 INFO L225 Difference]: With dead ends: 152 [2020-09-15 13:50:04,829 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 13:50:04,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=749, Invalid=2007, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 13:50:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 13:50:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 80. [2020-09-15 13:50:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-15 13:50:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2020-09-15 13:50:04,832 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 29 [2020-09-15 13:50:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:04,832 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2020-09-15 13:50:04,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2020-09-15 13:50:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:04,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:04,832 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:05,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-15 13:50:05,033 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 112 times [2020-09-15 13:50:05,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:05,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010812288] [2020-09-15 13:50:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:05,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010812288] [2020-09-15 13:50:05,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002901685] [2020-09-15 13:50:05,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:05,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:50:05,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:05,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:05,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:05,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [75423034] [2020-09-15 13:50:05,584 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:05,586 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:05,594 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:05,594 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:05,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:05,607 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:05,658 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:05,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:05,670 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [40839#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:50:05,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:05,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:05,671 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand 26 states. [2020-09-15 13:50:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:06,801 INFO L93 Difference]: Finished difference Result 149 states and 338 transitions. [2020-09-15 13:50:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:50:06,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:06,803 INFO L225 Difference]: With dead ends: 149 [2020-09-15 13:50:06,803 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 13:50:06,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2194, Unknown=0, NotChecked=0, Total=2970 [2020-09-15 13:50:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 13:50:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 82. [2020-09-15 13:50:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:50:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 204 transitions. [2020-09-15 13:50:06,806 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 204 transitions. Word has length 29 [2020-09-15 13:50:06,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:06,806 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 204 transitions. [2020-09-15 13:50:06,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 204 transitions. [2020-09-15 13:50:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:06,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:06,806 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:07,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 13:50:07,007 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 113 times [2020-09-15 13:50:07,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:07,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580908024] [2020-09-15 13:50:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:07,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580908024] [2020-09-15 13:50:07,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069060] [2020-09-15 13:50:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:07,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 13:50:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:07,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:07,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:07,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [586406102] [2020-09-15 13:50:07,541 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:07,542 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:07,548 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:07,548 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:07,550 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:07,551 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:07,598 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:07,599 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:07,609 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41320#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:50:07,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:07,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:07,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:07,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:07,610 INFO L87 Difference]: Start difference. First operand 82 states and 204 transitions. Second operand 26 states. [2020-09-15 13:50:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:08,818 INFO L93 Difference]: Finished difference Result 147 states and 336 transitions. [2020-09-15 13:50:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:50:08,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:08,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:08,819 INFO L225 Difference]: With dead ends: 147 [2020-09-15 13:50:08,820 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 13:50:08,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:50:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 13:50:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 84. [2020-09-15 13:50:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 13:50:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 210 transitions. [2020-09-15 13:50:08,823 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 210 transitions. Word has length 29 [2020-09-15 13:50:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:08,823 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 210 transitions. [2020-09-15 13:50:08,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 210 transitions. [2020-09-15 13:50:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:08,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:08,824 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:09,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 13:50:09,032 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 114 times [2020-09-15 13:50:09,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:09,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252891401] [2020-09-15 13:50:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:09,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252891401] [2020-09-15 13:50:09,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951597783] [2020-09-15 13:50:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:09,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 13:50:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:09,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:09,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:09,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [586147719] [2020-09-15 13:50:09,563 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:09,564 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:09,571 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:09,571 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:09,573 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:09,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:09,621 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:09,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:09,630 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:50:09,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:09,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:09,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:09,632 INFO L87 Difference]: Start difference. First operand 84 states and 210 transitions. Second operand 26 states. [2020-09-15 13:50:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:10,929 INFO L93 Difference]: Finished difference Result 145 states and 334 transitions. [2020-09-15 13:50:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:50:10,930 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:10,931 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:50:10,931 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:50:10,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2544, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 13:50:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:50:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2020-09-15 13:50:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:50:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 216 transitions. [2020-09-15 13:50:10,935 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 216 transitions. Word has length 29 [2020-09-15 13:50:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:10,935 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 216 transitions. [2020-09-15 13:50:10,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 216 transitions. [2020-09-15 13:50:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:10,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:10,936 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:11,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 13:50:11,156 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:11,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 115 times [2020-09-15 13:50:11,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:11,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604851364] [2020-09-15 13:50:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:11,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604851364] [2020-09-15 13:50:11,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494960864] [2020-09-15 13:50:11,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:11,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:11,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:11,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881075974] [2020-09-15 13:50:11,656 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:11,659 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:11,679 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:11,679 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:11,681 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:11,682 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:11,736 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:11,736 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:11,746 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42300#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:50:11,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:11,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:11,747 INFO L87 Difference]: Start difference. First operand 86 states and 216 transitions. Second operand 26 states. [2020-09-15 13:50:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:13,149 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-15 13:50:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:50:13,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:13,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:13,151 INFO L225 Difference]: With dead ends: 143 [2020-09-15 13:50:13,151 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 13:50:13,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=953, Invalid=2707, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:50:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 13:50:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 88. [2020-09-15 13:50:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 13:50:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 222 transitions. [2020-09-15 13:50:13,154 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 222 transitions. Word has length 29 [2020-09-15 13:50:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:13,155 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 222 transitions. [2020-09-15 13:50:13,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 222 transitions. [2020-09-15 13:50:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:13,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:13,156 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:13,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:13,361 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:13,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:13,361 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 116 times [2020-09-15 13:50:13,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:13,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578324525] [2020-09-15 13:50:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578324525] [2020-09-15 13:50:13,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976387073] [2020-09-15 13:50:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:13,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:50:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:13,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:13,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:13,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1942669917] [2020-09-15 13:50:13,861 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:13,863 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:13,886 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:13,886 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:13,889 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:13,889 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:13,937 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:13,938 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:13,947 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [42799#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:50:13,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:13,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:13,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:13,948 INFO L87 Difference]: Start difference. First operand 88 states and 222 transitions. Second operand 26 states. [2020-09-15 13:50:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:15,439 INFO L93 Difference]: Finished difference Result 141 states and 330 transitions. [2020-09-15 13:50:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:50:15,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:15,441 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:50:15,441 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 13:50:15,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1044, Invalid=2862, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:50:15,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 13:50:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 90. [2020-09-15 13:50:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:50:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2020-09-15 13:50:15,444 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 29 [2020-09-15 13:50:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:15,444 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2020-09-15 13:50:15,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2020-09-15 13:50:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:15,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:15,445 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:15,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 13:50:15,651 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 117 times [2020-09-15 13:50:15,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:15,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456305001] [2020-09-15 13:50:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:16,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456305001] [2020-09-15 13:50:16,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638447085] [2020-09-15 13:50:16,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:16,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 13:50:16,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:16,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:16,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:16,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:16,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:16,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477253383] [2020-09-15 13:50:16,155 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:16,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:16,162 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:16,162 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:16,164 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:16,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:16,215 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:16,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:16,230 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43304#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:50:16,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:16,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:16,231 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand 26 states. [2020-09-15 13:50:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:17,860 INFO L93 Difference]: Finished difference Result 139 states and 328 transitions. [2020-09-15 13:50:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:50:17,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:17,862 INFO L225 Difference]: With dead ends: 139 [2020-09-15 13:50:17,862 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 13:50:17,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1151, Invalid=3009, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:50:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 13:50:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2020-09-15 13:50:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 13:50:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 234 transitions. [2020-09-15 13:50:17,865 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 234 transitions. Word has length 29 [2020-09-15 13:50:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:17,865 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 234 transitions. [2020-09-15 13:50:17,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 234 transitions. [2020-09-15 13:50:17,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:17,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:17,866 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:18,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:18,067 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 118 times [2020-09-15 13:50:18,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:18,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202144615] [2020-09-15 13:50:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:18,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202144615] [2020-09-15 13:50:18,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490876936] [2020-09-15 13:50:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:18,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:50:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:18,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:18,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:18,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:18,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:18,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1203632962] [2020-09-15 13:50:18,568 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:18,570 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:18,576 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:18,576 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:18,578 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:18,579 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:18,626 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:18,626 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:18,636 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43815#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:50:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:18,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:18,637 INFO L87 Difference]: Start difference. First operand 92 states and 234 transitions. Second operand 26 states. [2020-09-15 13:50:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:20,350 INFO L93 Difference]: Finished difference Result 137 states and 326 transitions. [2020-09-15 13:50:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:50:20,351 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:20,352 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:50:20,352 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:50:20,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1274, Invalid=3148, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 13:50:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:50:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-09-15 13:50:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:50:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 240 transitions. [2020-09-15 13:50:20,354 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 240 transitions. Word has length 29 [2020-09-15 13:50:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:20,355 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 240 transitions. [2020-09-15 13:50:20,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 240 transitions. [2020-09-15 13:50:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:20,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:20,355 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:20,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:20,556 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 119 times [2020-09-15 13:50:20,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:20,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582340705] [2020-09-15 13:50:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:20,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582340705] [2020-09-15 13:50:20,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574890182] [2020-09-15 13:50:20,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:21,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 13:50:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:21,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:21,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:21,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1108021942] [2020-09-15 13:50:21,065 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:21,067 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:21,073 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:21,073 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:21,083 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:21,083 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:21,129 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:21,129 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:21,139 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:50:21,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:21,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:21,140 INFO L87 Difference]: Start difference. First operand 94 states and 240 transitions. Second operand 26 states. [2020-09-15 13:50:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:22,966 INFO L93 Difference]: Finished difference Result 137 states and 329 transitions. [2020-09-15 13:50:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:50:22,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:22,967 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:50:22,967 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:50:22,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1413, Invalid=3279, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:50:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:50:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2020-09-15 13:50:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 13:50:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 248 transitions. [2020-09-15 13:50:22,970 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 248 transitions. Word has length 29 [2020-09-15 13:50:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:22,970 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 248 transitions. [2020-09-15 13:50:22,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 248 transitions. [2020-09-15 13:50:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-15 13:50:22,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:22,971 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:23,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2020-09-15 13:50:23,172 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 120 times [2020-09-15 13:50:23,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:23,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107093394] [2020-09-15 13:50:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:23,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107093394] [2020-09-15 13:50:23,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62739315] [2020-09-15 13:50:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:23,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 13:50:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-15 13:50:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:23,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:23,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-15 13:50:23,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7398229] [2020-09-15 13:50:23,676 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:23,678 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:23,686 INFO L274 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-09-15 13:50:23,686 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:23,689 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:23,689 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:23,731 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:23,732 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:23,741 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44857#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:50:23,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-15 13:50:23,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-15 13:50:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:50:23,742 INFO L87 Difference]: Start difference. First operand 96 states and 248 transitions. Second operand 26 states. [2020-09-15 13:50:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:25,661 INFO L93 Difference]: Finished difference Result 138 states and 339 transitions. [2020-09-15 13:50:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 13:50:25,663 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-15 13:50:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:25,663 INFO L225 Difference]: With dead ends: 138 [2020-09-15 13:50:25,663 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 13:50:25,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1566, Invalid=3404, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 13:50:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 13:50:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2020-09-15 13:50:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 13:50:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-15 13:50:25,666 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2020-09-15 13:50:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:25,666 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-15 13:50:25,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-15 13:50:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-15 13:50:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:25,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:25,667 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:25,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:25,868 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 121 times [2020-09-15 13:50:25,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:25,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442974447] [2020-09-15 13:50:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:26,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442974447] [2020-09-15 13:50:26,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480769096] [2020-09-15 13:50:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:26,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:26,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:26,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [629344487] [2020-09-15 13:50:26,503 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:26,505 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:26,512 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-15 13:50:26,512 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:26,515 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:26,516 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:26,569 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:26,569 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:26,582 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45347#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:50:26,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:26,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:26,583 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 27 states. [2020-09-15 13:50:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:27,550 INFO L93 Difference]: Finished difference Result 134 states and 306 transitions. [2020-09-15 13:50:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 13:50:27,551 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:27,552 INFO L225 Difference]: With dead ends: 134 [2020-09-15 13:50:27,552 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 13:50:27,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 13:50:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 13:50:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 81. [2020-09-15 13:50:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-15 13:50:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 200 transitions. [2020-09-15 13:50:27,556 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 200 transitions. Word has length 30 [2020-09-15 13:50:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:27,556 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 200 transitions. [2020-09-15 13:50:27,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 200 transitions. [2020-09-15 13:50:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:27,557 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:27,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:27,767 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:27,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 122 times [2020-09-15 13:50:27,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:27,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967610196] [2020-09-15 13:50:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:28,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967610196] [2020-09-15 13:50:28,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153859289] [2020-09-15 13:50:28,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:28,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:50:28,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:28,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:28,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:28,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:28,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:28,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [189739175] [2020-09-15 13:50:28,384 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:28,386 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:28,394 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:28,395 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:28,396 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:28,396 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:28,446 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:28,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:28,457 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45807#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:50:28,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:28,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:28,458 INFO L87 Difference]: Start difference. First operand 81 states and 200 transitions. Second operand 27 states. [2020-09-15 13:50:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:29,549 INFO L93 Difference]: Finished difference Result 131 states and 302 transitions. [2020-09-15 13:50:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:50:29,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:29,551 INFO L225 Difference]: With dead ends: 131 [2020-09-15 13:50:29,551 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 13:50:29,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=2103, Unknown=0, NotChecked=0, Total=2862 [2020-09-15 13:50:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 13:50:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2020-09-15 13:50:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 13:50:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 206 transitions. [2020-09-15 13:50:29,554 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 206 transitions. Word has length 30 [2020-09-15 13:50:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:29,554 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 206 transitions. [2020-09-15 13:50:29,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 206 transitions. [2020-09-15 13:50:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:29,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:29,555 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:29,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 13:50:29,756 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 123 times [2020-09-15 13:50:29,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:29,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266890044] [2020-09-15 13:50:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:30,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266890044] [2020-09-15 13:50:30,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108117948] [2020-09-15 13:50:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:30,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 13:50:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:30,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:30,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:30,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1401173130] [2020-09-15 13:50:30,364 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:30,366 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:30,373 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:30,373 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:30,374 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:30,374 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:30,427 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:30,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:30,439 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46272#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:50:30,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:30,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:30,440 INFO L87 Difference]: Start difference. First operand 83 states and 206 transitions. Second operand 27 states. [2020-09-15 13:50:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:31,628 INFO L93 Difference]: Finished difference Result 129 states and 300 transitions. [2020-09-15 13:50:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:50:31,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:31,629 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:50:31,629 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:50:31,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 13:50:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:50:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-09-15 13:50:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 13:50:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 212 transitions. [2020-09-15 13:50:31,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 212 transitions. Word has length 30 [2020-09-15 13:50:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:31,632 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 212 transitions. [2020-09-15 13:50:31,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 212 transitions. [2020-09-15 13:50:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:31,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:31,633 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:31,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:31,834 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 124 times [2020-09-15 13:50:31,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:31,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339477371] [2020-09-15 13:50:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339477371] [2020-09-15 13:50:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030909274] [2020-09-15 13:50:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:32,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:50:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:32,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:32,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:32,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1390203263] [2020-09-15 13:50:32,396 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:32,397 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:32,421 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:32,421 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:32,422 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:32,422 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:32,474 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:32,474 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:32,486 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [46743#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:50:32,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:32,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:32,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:32,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:32,488 INFO L87 Difference]: Start difference. First operand 85 states and 212 transitions. Second operand 27 states. [2020-09-15 13:50:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:33,787 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-15 13:50:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:50:33,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:33,789 INFO L225 Difference]: With dead ends: 127 [2020-09-15 13:50:33,789 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 13:50:33,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=831, Invalid=2475, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 13:50:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 13:50:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2020-09-15 13:50:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 13:50:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 218 transitions. [2020-09-15 13:50:33,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 218 transitions. Word has length 30 [2020-09-15 13:50:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:33,792 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 218 transitions. [2020-09-15 13:50:33,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 218 transitions. [2020-09-15 13:50:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:33,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:33,792 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:33,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 13:50:33,993 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 125 times [2020-09-15 13:50:33,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:33,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914633914] [2020-09-15 13:50:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:34,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914633914] [2020-09-15 13:50:34,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528054161] [2020-09-15 13:50:34,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:34,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 13:50:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:34,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:34,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:34,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1728552237] [2020-09-15 13:50:34,564 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:34,565 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:34,572 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:34,572 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:34,573 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:34,573 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:34,640 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:34,640 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:34,651 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47220#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:50:34,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:34,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:34,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:34,652 INFO L87 Difference]: Start difference. First operand 87 states and 218 transitions. Second operand 27 states. [2020-09-15 13:50:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:36,058 INFO L93 Difference]: Finished difference Result 125 states and 296 transitions. [2020-09-15 13:50:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:50:36,059 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:36,060 INFO L225 Difference]: With dead ends: 125 [2020-09-15 13:50:36,060 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 13:50:36,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=891, Invalid=2649, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 13:50:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 13:50:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2020-09-15 13:50:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 13:50:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2020-09-15 13:50:36,063 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 30 [2020-09-15 13:50:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:36,063 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2020-09-15 13:50:36,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2020-09-15 13:50:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:36,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:36,064 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:36,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:36,267 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 126 times [2020-09-15 13:50:36,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:36,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449792405] [2020-09-15 13:50:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:36,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449792405] [2020-09-15 13:50:36,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27270863] [2020-09-15 13:50:36,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:36,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-15 13:50:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:36,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:36,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:36,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7211865] [2020-09-15 13:50:36,911 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:36,916 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:36,927 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:36,928 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:36,930 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:36,931 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:36,992 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:36,992 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:37,008 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [47703#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:50:37,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:37,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:37,040 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand 27 states. [2020-09-15 13:50:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:38,555 INFO L93 Difference]: Finished difference Result 123 states and 294 transitions. [2020-09-15 13:50:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:50:38,556 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:38,557 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:50:38,558 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:50:38,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2815, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 13:50:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:50:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-15 13:50:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 13:50:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 230 transitions. [2020-09-15 13:50:38,561 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 230 transitions. Word has length 30 [2020-09-15 13:50:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:38,561 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 230 transitions. [2020-09-15 13:50:38,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 230 transitions. [2020-09-15 13:50:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:38,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:38,562 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:38,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 13:50:38,770 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:38,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 127 times [2020-09-15 13:50:38,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:38,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379272597] [2020-09-15 13:50:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:39,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379272597] [2020-09-15 13:50:39,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042756494] [2020-09-15 13:50:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:39,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:39,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:39,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [854590079] [2020-09-15 13:50:39,303 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:39,305 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:39,312 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:39,312 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:39,313 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:39,314 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:39,363 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:39,364 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:39,375 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48192#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:50:39,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:39,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:39,377 INFO L87 Difference]: Start difference. First operand 91 states and 230 transitions. Second operand 27 states. [2020-09-15 13:50:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:40,999 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2020-09-15 13:50:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:50:41,000 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:41,000 INFO L225 Difference]: With dead ends: 121 [2020-09-15 13:50:41,000 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 13:50:41,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 13:50:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 13:50:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2020-09-15 13:50:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 13:50:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 236 transitions. [2020-09-15 13:50:41,004 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 236 transitions. Word has length 30 [2020-09-15 13:50:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:41,004 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 236 transitions. [2020-09-15 13:50:41,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 236 transitions. [2020-09-15 13:50:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:41,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:41,005 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:41,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:41,206 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:41,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:41,206 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 128 times [2020-09-15 13:50:41,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:41,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227029092] [2020-09-15 13:50:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:41,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227029092] [2020-09-15 13:50:41,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805085213] [2020-09-15 13:50:41,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:41,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:50:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:41,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:41,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:41,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1582737282] [2020-09-15 13:50:41,743 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:41,744 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:41,751 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:41,751 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:41,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:41,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:41,802 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:41,802 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:41,814 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48687#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:50:41,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:41,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:41,815 INFO L87 Difference]: Start difference. First operand 93 states and 236 transitions. Second operand 27 states. [2020-09-15 13:50:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:43,549 INFO L93 Difference]: Finished difference Result 119 states and 290 transitions. [2020-09-15 13:50:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:50:43,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:43,551 INFO L225 Difference]: With dead ends: 119 [2020-09-15 13:50:43,551 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 13:50:43,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1167, Invalid=3123, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 13:50:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 13:50:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2020-09-15 13:50:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 13:50:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 242 transitions. [2020-09-15 13:50:43,553 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 242 transitions. Word has length 30 [2020-09-15 13:50:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:43,553 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 242 transitions. [2020-09-15 13:50:43,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 242 transitions. [2020-09-15 13:50:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:43,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:43,553 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:43,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 13:50:43,755 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 129 times [2020-09-15 13:50:43,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:43,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352841174] [2020-09-15 13:50:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:44,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352841174] [2020-09-15 13:50:44,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904413549] [2020-09-15 13:50:44,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:44,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-15 13:50:44,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:44,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:44,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:44,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:44,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564863960] [2020-09-15 13:50:44,271 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:44,272 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:44,279 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:44,279 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:44,279 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:44,280 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:44,348 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:44,348 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:44,361 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49188#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:50:44,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:44,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:44,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:44,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:44,362 INFO L87 Difference]: Start difference. First operand 95 states and 242 transitions. Second operand 27 states. [2020-09-15 13:50:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:46,202 INFO L93 Difference]: Finished difference Result 117 states and 288 transitions. [2020-09-15 13:50:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:50:46,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:46,204 INFO L225 Difference]: With dead ends: 117 [2020-09-15 13:50:46,204 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 13:50:46,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1291, Invalid=3265, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 13:50:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 13:50:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2020-09-15 13:50:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 13:50:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 248 transitions. [2020-09-15 13:50:46,207 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 248 transitions. Word has length 30 [2020-09-15 13:50:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:46,207 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 248 transitions. [2020-09-15 13:50:46,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 248 transitions. [2020-09-15 13:50:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:46,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:46,208 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:46,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:46,415 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 130 times [2020-09-15 13:50:46,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:46,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824412291] [2020-09-15 13:50:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:46,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824412291] [2020-09-15 13:50:46,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121204450] [2020-09-15 13:50:46,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:46,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:50:46,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:46,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:46,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:46,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:46,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1531210702] [2020-09-15 13:50:46,939 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:46,941 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:46,968 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:46,968 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:46,969 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:46,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:47,018 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:47,019 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:47,030 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [49695#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:50:47,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:47,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:47,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:47,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:47,031 INFO L87 Difference]: Start difference. First operand 97 states and 248 transitions. Second operand 27 states. [2020-09-15 13:50:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:49,016 INFO L93 Difference]: Finished difference Result 117 states and 291 transitions. [2020-09-15 13:50:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:50:49,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:49,018 INFO L225 Difference]: With dead ends: 117 [2020-09-15 13:50:49,018 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 13:50:49,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1431, Invalid=3399, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:50:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 13:50:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-09-15 13:50:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 13:50:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 256 transitions. [2020-09-15 13:50:49,021 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 256 transitions. Word has length 30 [2020-09-15 13:50:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:49,021 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 256 transitions. [2020-09-15 13:50:49,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 256 transitions. [2020-09-15 13:50:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:50:49,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:49,022 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:49,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:49,223 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 131 times [2020-09-15 13:50:49,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:49,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883175772] [2020-09-15 13:50:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:49,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883175772] [2020-09-15 13:50:49,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943582716] [2020-09-15 13:50:49,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:49,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 13:50:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-15 13:50:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:49,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:49,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-15 13:50:49,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858110818] [2020-09-15 13:50:49,775 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:49,777 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:49,784 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-09-15 13:50:49,784 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:49,784 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:49,784 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:49,832 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:49,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:49,846 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50210#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:50:49,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-15 13:50:49,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-15 13:50:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:50:49,847 INFO L87 Difference]: Start difference. First operand 99 states and 256 transitions. Second operand 27 states. [2020-09-15 13:50:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:51,870 INFO L93 Difference]: Finished difference Result 117 states and 299 transitions. [2020-09-15 13:50:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-15 13:50:51,871 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-15 13:50:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:51,872 INFO L225 Difference]: With dead ends: 117 [2020-09-15 13:50:51,872 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 13:50:51,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1585, Invalid=3527, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:50:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 13:50:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-15 13:50:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-15 13:50:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-15 13:50:51,874 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2020-09-15 13:50:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:51,875 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-15 13:50:51,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-15 13:50:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-15 13:50:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:50:51,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:51,875 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:52,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:50:52,076 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:52,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 132 times [2020-09-15 13:50:52,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:52,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263253750] [2020-09-15 13:50:52,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:52,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263253750] [2020-09-15 13:50:52,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341785967] [2020-09-15 13:50:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:52,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 13:50:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:50:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:52,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:52,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:50:52,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809326150] [2020-09-15 13:50:52,754 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:52,756 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:52,763 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 51 transitions. [2020-09-15 13:50:52,763 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:52,767 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,768 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,809 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,810 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,842 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,843 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,851 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,851 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,861 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,861 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,867 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,867 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,898 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,899 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:52,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:52,914 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [50683#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:50:52,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:50:52,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:52,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:50:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:50:52,915 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 28 states. [2020-09-15 13:50:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:53,975 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2020-09-15 13:50:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:50:53,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:50:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:53,976 INFO L225 Difference]: With dead ends: 114 [2020-09-15 13:50:53,977 INFO L226 Difference]: Without dead ends: 108 [2020-09-15 13:50:53,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2020-09-15 13:50:53,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-15 13:50:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-15 13:50:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:50:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-15 13:50:53,978 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 31 [2020-09-15 13:50:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:53,979 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-15 13:50:53,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:50:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-15 13:50:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:50:53,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:53,979 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:54,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 13:50:54,182 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 133 times [2020-09-15 13:50:54,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:54,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922806858] [2020-09-15 13:50:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:54,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922806858] [2020-09-15 13:50:54,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168569786] [2020-09-15 13:50:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:50:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:54,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:54,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:50:54,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [656432892] [2020-09-15 13:50:54,855 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:54,857 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:54,864 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:50:54,864 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:54,864 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:54,865 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:54,916 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:54,917 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:54,927 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51129#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:50:54,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:50:54,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:54,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:50:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:50:54,928 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 28 states. [2020-09-15 13:50:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:56,149 INFO L93 Difference]: Finished difference Result 162 states and 364 transitions. [2020-09-15 13:50:56,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:50:56,150 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:50:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:56,150 INFO L225 Difference]: With dead ends: 162 [2020-09-15 13:50:56,151 INFO L226 Difference]: Without dead ends: 156 [2020-09-15 13:50:56,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=872, Invalid=2320, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:50:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-15 13:50:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 84. [2020-09-15 13:50:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-15 13:50:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 208 transitions. [2020-09-15 13:50:56,153 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 208 transitions. Word has length 31 [2020-09-15 13:50:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:56,154 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 208 transitions. [2020-09-15 13:50:56,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:50:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 208 transitions. [2020-09-15 13:50:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:50:56,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:56,154 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:56,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-15 13:50:56,356 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 134 times [2020-09-15 13:50:56,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:56,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134587296] [2020-09-15 13:50:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:56,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134587296] [2020-09-15 13:50:56,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981629890] [2020-09-15 13:50:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:56,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:50:56,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:50:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:57,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:57,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:50:57,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511518880] [2020-09-15 13:50:57,034 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:57,039 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:57,052 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:50:57,052 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:57,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:57,058 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:57,118 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:57,118 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:57,130 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [51635#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:50:57,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:50:57,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:57,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:50:57,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:50:57,132 INFO L87 Difference]: Start difference. First operand 84 states and 208 transitions. Second operand 28 states. [2020-09-15 13:50:58,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:50:58,496 INFO L93 Difference]: Finished difference Result 159 states and 360 transitions. [2020-09-15 13:50:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:50:58,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:50:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:50:58,497 INFO L225 Difference]: With dead ends: 159 [2020-09-15 13:50:58,497 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 13:50:58,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=897, Invalid=2525, Unknown=0, NotChecked=0, Total=3422 [2020-09-15 13:50:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 13:50:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2020-09-15 13:50:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:50:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 214 transitions. [2020-09-15 13:50:58,500 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 214 transitions. Word has length 31 [2020-09-15 13:50:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:50:58,500 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 214 transitions. [2020-09-15 13:50:58,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:50:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 214 transitions. [2020-09-15 13:50:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:50:58,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:50:58,501 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:50:58,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 13:50:58,702 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:50:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:50:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 135 times [2020-09-15 13:50:58,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:50:58,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285602092] [2020-09-15 13:50:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:50:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:50:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:59,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285602092] [2020-09-15 13:50:59,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374538675] [2020-09-15 13:50:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:50:59,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 13:50:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:50:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:50:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:50:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:50:59,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:50:59,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:50:59,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224135386] [2020-09-15 13:50:59,321 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:50:59,323 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:50:59,330 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:50:59,330 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:50:59,332 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:59,333 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:59,382 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:50:59,383 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:50:59,393 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52146#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:50:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:50:59,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:50:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:50:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:50:59,394 INFO L87 Difference]: Start difference. First operand 86 states and 214 transitions. Second operand 28 states. [2020-09-15 13:51:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:00,767 INFO L93 Difference]: Finished difference Result 157 states and 358 transitions. [2020-09-15 13:51:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:51:00,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:00,769 INFO L225 Difference]: With dead ends: 157 [2020-09-15 13:51:00,769 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 13:51:00,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=2722, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:51:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 13:51:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2020-09-15 13:51:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 13:51:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 220 transitions. [2020-09-15 13:51:00,772 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 220 transitions. Word has length 31 [2020-09-15 13:51:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:00,772 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 220 transitions. [2020-09-15 13:51:00,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 220 transitions. [2020-09-15 13:51:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:00,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:00,772 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:00,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-15 13:51:00,975 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 136 times [2020-09-15 13:51:00,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:00,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542983061] [2020-09-15 13:51:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:01,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542983061] [2020-09-15 13:51:01,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822791034] [2020-09-15 13:51:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:01,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:51:01,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:01,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:01,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:01,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:01,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346941882] [2020-09-15 13:51:01,576 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:01,578 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:01,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:01,585 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:01,587 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:01,587 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:01,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:01,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:01,648 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52663#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:51:01,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:01,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:01,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:01,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:01,648 INFO L87 Difference]: Start difference. First operand 88 states and 220 transitions. Second operand 28 states. [2020-09-15 13:51:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:03,140 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-15 13:51:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:51:03,141 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:03,141 INFO L225 Difference]: With dead ends: 155 [2020-09-15 13:51:03,141 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 13:51:03,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=995, Invalid=2911, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:51:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 13:51:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 90. [2020-09-15 13:51:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:51:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 226 transitions. [2020-09-15 13:51:03,144 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 226 transitions. Word has length 31 [2020-09-15 13:51:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:03,145 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 226 transitions. [2020-09-15 13:51:03,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 226 transitions. [2020-09-15 13:51:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:03,145 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:03,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-15 13:51:03,346 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 137 times [2020-09-15 13:51:03,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:03,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910886] [2020-09-15 13:51:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:03,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910886] [2020-09-15 13:51:03,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683972462] [2020-09-15 13:51:03,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:03,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 13:51:03,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:03,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:03,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:03,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:03,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1120140068] [2020-09-15 13:51:03,953 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:03,954 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:03,961 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:03,961 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:03,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:03,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:04,014 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:04,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:04,025 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53186#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:51:04,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:04,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:04,026 INFO L87 Difference]: Start difference. First operand 90 states and 226 transitions. Second operand 28 states. [2020-09-15 13:51:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:05,613 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-15 13:51:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:51:05,614 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:05,614 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:51:05,614 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:51:05,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1068, Invalid=3092, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:51:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:51:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 92. [2020-09-15 13:51:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 13:51:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 232 transitions. [2020-09-15 13:51:05,617 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 232 transitions. Word has length 31 [2020-09-15 13:51:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:05,617 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 232 transitions. [2020-09-15 13:51:05,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 232 transitions. [2020-09-15 13:51:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:05,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:05,618 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:05,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:05,819 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 138 times [2020-09-15 13:51:05,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:05,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401410096] [2020-09-15 13:51:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:06,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401410096] [2020-09-15 13:51:06,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618918473] [2020-09-15 13:51:06,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:06,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 13:51:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:06,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:06,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:06,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865815127] [2020-09-15 13:51:06,413 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:06,416 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:06,425 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:06,425 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:06,429 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:06,429 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:06,478 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:06,478 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:06,493 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [53715#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:51:06,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:06,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:06,494 INFO L87 Difference]: Start difference. First operand 92 states and 232 transitions. Second operand 28 states. [2020-09-15 13:51:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:08,168 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-15 13:51:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:51:08,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:08,169 INFO L225 Difference]: With dead ends: 151 [2020-09-15 13:51:08,169 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 13:51:08,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 13:51:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 13:51:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 94. [2020-09-15 13:51:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:51:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 238 transitions. [2020-09-15 13:51:08,172 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 238 transitions. Word has length 31 [2020-09-15 13:51:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:08,172 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 238 transitions. [2020-09-15 13:51:08,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 238 transitions. [2020-09-15 13:51:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:08,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:08,173 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:08,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 13:51:08,374 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 139 times [2020-09-15 13:51:08,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:08,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307050475] [2020-09-15 13:51:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:08,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307050475] [2020-09-15 13:51:08,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858922185] [2020-09-15 13:51:08,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:08,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:08,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:08,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [151177068] [2020-09-15 13:51:08,942 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:08,944 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:08,950 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:08,950 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:08,951 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:08,951 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:09,000 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:09,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:09,012 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54250#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:51:09,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:09,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:09,013 INFO L87 Difference]: Start difference. First operand 94 states and 238 transitions. Second operand 28 states. [2020-09-15 13:51:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:10,835 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-15 13:51:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:51:10,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:10,837 INFO L225 Difference]: With dead ends: 149 [2020-09-15 13:51:10,837 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 13:51:10,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1262, Invalid=3430, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:51:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 13:51:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-09-15 13:51:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 13:51:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 244 transitions. [2020-09-15 13:51:10,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 244 transitions. Word has length 31 [2020-09-15 13:51:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:10,840 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 244 transitions. [2020-09-15 13:51:10,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 244 transitions. [2020-09-15 13:51:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:10,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:10,841 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:11,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:11,042 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:11,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:11,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 140 times [2020-09-15 13:51:11,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:11,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919104670] [2020-09-15 13:51:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919104670] [2020-09-15 13:51:11,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917424488] [2020-09-15 13:51:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:11,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:51:11,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:11,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:11,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:11,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [827312635] [2020-09-15 13:51:11,598 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:11,599 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:11,606 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:11,606 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:11,609 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:11,609 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:11,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:11,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:11,667 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54791#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:51:11,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:11,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:11,669 INFO L87 Difference]: Start difference. First operand 96 states and 244 transitions. Second operand 28 states. [2020-09-15 13:51:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:13,547 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-15 13:51:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:51:13,548 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:13,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:13,548 INFO L225 Difference]: With dead ends: 147 [2020-09-15 13:51:13,548 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 13:51:13,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1383, Invalid=3587, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 13:51:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 13:51:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-15 13:51:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 13:51:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 250 transitions. [2020-09-15 13:51:13,551 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 250 transitions. Word has length 31 [2020-09-15 13:51:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:13,551 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 250 transitions. [2020-09-15 13:51:13,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 250 transitions. [2020-09-15 13:51:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:13,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:13,551 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:13,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:13,752 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 141 times [2020-09-15 13:51:13,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:13,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829687681] [2020-09-15 13:51:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:14,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829687681] [2020-09-15 13:51:14,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839602176] [2020-09-15 13:51:14,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:14,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 13:51:14,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:14,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:14,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:14,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252195846] [2020-09-15 13:51:14,326 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:14,327 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:14,334 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:14,334 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:14,336 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:14,337 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:14,387 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:14,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:14,398 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55338#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:51:14,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:14,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:14,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:14,399 INFO L87 Difference]: Start difference. First operand 98 states and 250 transitions. Second operand 28 states. [2020-09-15 13:51:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:16,406 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-15 13:51:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:51:16,407 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:16,408 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:51:16,408 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:51:16,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1520, Invalid=3736, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 13:51:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:51:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2020-09-15 13:51:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 13:51:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 256 transitions. [2020-09-15 13:51:16,410 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 256 transitions. Word has length 31 [2020-09-15 13:51:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:16,410 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 256 transitions. [2020-09-15 13:51:16,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 256 transitions. [2020-09-15 13:51:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:16,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:16,411 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:16,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:16,612 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 142 times [2020-09-15 13:51:16,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:16,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920553212] [2020-09-15 13:51:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:17,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920553212] [2020-09-15 13:51:17,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699804096] [2020-09-15 13:51:17,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:17,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:51:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:17,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:17,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:17,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [220817773] [2020-09-15 13:51:17,183 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:17,185 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:17,192 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:17,192 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:17,192 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:17,193 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:17,242 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:17,242 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:17,254 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55891#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:51:17,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:17,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:17,255 INFO L87 Difference]: Start difference. First operand 100 states and 256 transitions. Second operand 28 states. [2020-09-15 13:51:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:19,366 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-15 13:51:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:51:19,367 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:19,367 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:51:19,368 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:51:19,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1673, Invalid=3877, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 13:51:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:51:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2020-09-15 13:51:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 13:51:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 264 transitions. [2020-09-15 13:51:19,371 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 264 transitions. Word has length 31 [2020-09-15 13:51:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:19,371 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 264 transitions. [2020-09-15 13:51:19,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 264 transitions. [2020-09-15 13:51:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-15 13:51:19,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:19,371 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:19,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:19,572 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 143 times [2020-09-15 13:51:19,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:19,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925386171] [2020-09-15 13:51:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:20,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925386171] [2020-09-15 13:51:20,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967275971] [2020-09-15 13:51:20,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:20,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 13:51:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-15 13:51:20,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:20,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:20,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-15 13:51:20,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1654922784] [2020-09-15 13:51:20,161 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:20,163 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:20,171 INFO L274 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-09-15 13:51:20,171 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:20,173 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:20,173 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:20,221 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:20,221 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:20,231 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56452#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:51:20,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-15 13:51:20,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-15 13:51:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:51:20,232 INFO L87 Difference]: Start difference. First operand 102 states and 264 transitions. Second operand 28 states. [2020-09-15 13:51:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:22,396 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2020-09-15 13:51:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 13:51:22,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-15 13:51:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:22,397 INFO L225 Difference]: With dead ends: 146 [2020-09-15 13:51:22,398 INFO L226 Difference]: Without dead ends: 134 [2020-09-15 13:51:22,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1840, Invalid=4012, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 13:51:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-15 13:51:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2020-09-15 13:51:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:51:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-15 13:51:22,400 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 31 [2020-09-15 13:51:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:22,401 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-15 13:51:22,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-15 13:51:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-15 13:51:22,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:22,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:22,401 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:22,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-15 13:51:22,602 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:22,603 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 144 times [2020-09-15 13:51:22,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:22,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209470871] [2020-09-15 13:51:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:23,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209470871] [2020-09-15 13:51:23,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803220016] [2020-09-15 13:51:23,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:23,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 13:51:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:23,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:23,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:23,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1414663469] [2020-09-15 13:51:23,337 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:23,339 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:23,349 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 48 transitions. [2020-09-15 13:51:23,350 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:23,352 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:23,352 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:23,409 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:23,409 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:23,423 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56974#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:51:23,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:23,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:23,424 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 29 states. [2020-09-15 13:51:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:24,544 INFO L93 Difference]: Finished difference Result 142 states and 324 transitions. [2020-09-15 13:51:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:51:24,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:24,546 INFO L225 Difference]: With dead ends: 142 [2020-09-15 13:51:24,546 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 13:51:24,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-15 13:51:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 13:51:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 85. [2020-09-15 13:51:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-15 13:51:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 210 transitions. [2020-09-15 13:51:24,549 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 210 transitions. Word has length 32 [2020-09-15 13:51:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:24,549 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 210 transitions. [2020-09-15 13:51:24,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 210 transitions. [2020-09-15 13:51:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:24,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:24,549 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:24,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 13:51:24,750 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 145 times [2020-09-15 13:51:24,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:24,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118140925] [2020-09-15 13:51:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:25,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118140925] [2020-09-15 13:51:25,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895871955] [2020-09-15 13:51:25,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:25,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:25,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:25,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1405055548] [2020-09-15 13:51:25,464 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:25,465 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:25,473 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:25,473 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:25,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:25,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:25,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:25,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:25,541 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57462#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:51:25,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:25,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:25,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:25,541 INFO L87 Difference]: Start difference. First operand 85 states and 210 transitions. Second operand 29 states. [2020-09-15 13:51:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:26,782 INFO L93 Difference]: Finished difference Result 139 states and 320 transitions. [2020-09-15 13:51:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:51:26,783 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:26,784 INFO L225 Difference]: With dead ends: 139 [2020-09-15 13:51:26,784 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 13:51:26,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=882, Invalid=2424, Unknown=0, NotChecked=0, Total=3306 [2020-09-15 13:51:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 13:51:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2020-09-15 13:51:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-15 13:51:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 216 transitions. [2020-09-15 13:51:26,786 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 216 transitions. Word has length 32 [2020-09-15 13:51:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:26,786 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 216 transitions. [2020-09-15 13:51:26,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 216 transitions. [2020-09-15 13:51:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:26,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:26,787 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:26,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 13:51:26,988 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 146 times [2020-09-15 13:51:26,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:26,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567530643] [2020-09-15 13:51:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:27,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567530643] [2020-09-15 13:51:27,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616017912] [2020-09-15 13:51:27,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:51:27,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:27,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:27,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:27,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895569864] [2020-09-15 13:51:27,670 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:27,672 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:27,679 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:27,679 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:27,680 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:27,680 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:27,735 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:27,736 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:27,751 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [57955#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:51:27,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:27,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:27,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:27,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:27,751 INFO L87 Difference]: Start difference. First operand 87 states and 216 transitions. Second operand 29 states. [2020-09-15 13:51:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:29,115 INFO L93 Difference]: Finished difference Result 137 states and 318 transitions. [2020-09-15 13:51:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:51:29,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:29,117 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:51:29,117 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:51:29,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=908, Invalid=2632, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 13:51:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:51:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-09-15 13:51:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 13:51:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 222 transitions. [2020-09-15 13:51:29,120 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 222 transitions. Word has length 32 [2020-09-15 13:51:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:29,121 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 222 transitions. [2020-09-15 13:51:29,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 222 transitions. [2020-09-15 13:51:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:29,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:29,121 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:29,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 13:51:29,322 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 147 times [2020-09-15 13:51:29,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:29,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477779354] [2020-09-15 13:51:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:29,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477779354] [2020-09-15 13:51:29,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503193631] [2020-09-15 13:51:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 13:51:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:29,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:29,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:29,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:29,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101355616] [2020-09-15 13:51:29,987 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:29,989 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:29,997 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:29,997 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:29,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:29,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:30,052 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:30,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:30,064 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58454#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:51:30,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:30,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:30,065 INFO L87 Difference]: Start difference. First operand 89 states and 222 transitions. Second operand 29 states. [2020-09-15 13:51:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:31,530 INFO L93 Difference]: Finished difference Result 135 states and 316 transitions. [2020-09-15 13:51:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:51:31,531 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:31,532 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:51:31,532 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:51:31,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=950, Invalid=2832, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 13:51:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:51:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 91. [2020-09-15 13:51:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 13:51:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 228 transitions. [2020-09-15 13:51:31,535 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 228 transitions. Word has length 32 [2020-09-15 13:51:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:31,535 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 228 transitions. [2020-09-15 13:51:31,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 228 transitions. [2020-09-15 13:51:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:31,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:31,536 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:31,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 13:51:31,737 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 148 times [2020-09-15 13:51:31,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:31,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54640661] [2020-09-15 13:51:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:32,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54640661] [2020-09-15 13:51:32,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512327080] [2020-09-15 13:51:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:32,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:51:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:32,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:32,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1718644510] [2020-09-15 13:51:32,387 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:32,388 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:32,396 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:32,396 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:32,397 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:32,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:32,448 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:32,448 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:32,461 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58959#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:51:32,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:32,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:32,462 INFO L87 Difference]: Start difference. First operand 91 states and 228 transitions. Second operand 29 states. [2020-09-15 13:51:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:34,051 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-15 13:51:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:51:34,052 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:34,052 INFO L225 Difference]: With dead ends: 133 [2020-09-15 13:51:34,052 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 13:51:34,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1008, Invalid=3024, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 13:51:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 13:51:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2020-09-15 13:51:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 13:51:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 234 transitions. [2020-09-15 13:51:34,055 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 234 transitions. Word has length 32 [2020-09-15 13:51:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:34,055 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 234 transitions. [2020-09-15 13:51:34,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 234 transitions. [2020-09-15 13:51:34,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:34,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:34,056 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:34,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:34,257 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 149 times [2020-09-15 13:51:34,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:34,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804726667] [2020-09-15 13:51:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:34,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804726667] [2020-09-15 13:51:34,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974966811] [2020-09-15 13:51:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:34,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 13:51:34,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:34,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:34,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:34,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564970201] [2020-09-15 13:51:34,885 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:34,887 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:34,906 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:34,906 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:34,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:34,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:34,955 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:34,955 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:34,968 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59470#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:51:34,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:34,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:34,969 INFO L87 Difference]: Start difference. First operand 93 states and 234 transitions. Second operand 29 states. [2020-09-15 13:51:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:36,677 INFO L93 Difference]: Finished difference Result 131 states and 312 transitions. [2020-09-15 13:51:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:51:36,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:36,678 INFO L225 Difference]: With dead ends: 131 [2020-09-15 13:51:36,679 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 13:51:36,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1082, Invalid=3208, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 13:51:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 13:51:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2020-09-15 13:51:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 13:51:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 240 transitions. [2020-09-15 13:51:36,682 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 240 transitions. Word has length 32 [2020-09-15 13:51:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:36,682 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 240 transitions. [2020-09-15 13:51:36,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 240 transitions. [2020-09-15 13:51:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:36,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:36,682 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:36,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:36,883 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:36,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 150 times [2020-09-15 13:51:36,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:36,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685692357] [2020-09-15 13:51:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:37,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685692357] [2020-09-15 13:51:37,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850780306] [2020-09-15 13:51:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:37,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-15 13:51:37,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:37,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:37,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:37,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592416362] [2020-09-15 13:51:37,528 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:37,530 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:37,539 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:37,539 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:37,546 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:37,546 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:37,594 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:37,594 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:37,607 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59987#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:51:37,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:37,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:37,608 INFO L87 Difference]: Start difference. First operand 95 states and 240 transitions. Second operand 29 states. [2020-09-15 13:51:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:39,412 INFO L93 Difference]: Finished difference Result 129 states and 310 transitions. [2020-09-15 13:51:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:51:39,413 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:39,414 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:51:39,414 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:51:39,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1172, Invalid=3384, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 13:51:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:51:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-09-15 13:51:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 13:51:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 246 transitions. [2020-09-15 13:51:39,417 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 246 transitions. Word has length 32 [2020-09-15 13:51:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:39,418 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 246 transitions. [2020-09-15 13:51:39,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 246 transitions. [2020-09-15 13:51:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:39,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:39,418 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:39,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:39,625 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 151 times [2020-09-15 13:51:39,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:39,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158598262] [2020-09-15 13:51:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:40,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158598262] [2020-09-15 13:51:40,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680486639] [2020-09-15 13:51:40,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:40,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:40,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:40,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1369491705] [2020-09-15 13:51:40,247 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:40,249 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:40,256 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:40,256 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:40,258 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:40,258 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:40,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:40,311 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:40,322 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [60510#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:51:40,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:40,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:40,323 INFO L87 Difference]: Start difference. First operand 97 states and 246 transitions. Second operand 29 states. [2020-09-15 13:51:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:42,283 INFO L93 Difference]: Finished difference Result 127 states and 308 transitions. [2020-09-15 13:51:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:51:42,283 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:42,284 INFO L225 Difference]: With dead ends: 127 [2020-09-15 13:51:42,284 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 13:51:42,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1278, Invalid=3552, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:51:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 13:51:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-15 13:51:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 13:51:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 252 transitions. [2020-09-15 13:51:42,288 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 252 transitions. Word has length 32 [2020-09-15 13:51:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:42,288 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 252 transitions. [2020-09-15 13:51:42,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 252 transitions. [2020-09-15 13:51:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:42,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:42,289 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:42,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:42,497 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 152 times [2020-09-15 13:51:42,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:42,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010625610] [2020-09-15 13:51:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:43,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010625610] [2020-09-15 13:51:43,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628549906] [2020-09-15 13:51:43,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:43,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:51:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:43,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:43,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:43,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1175854857] [2020-09-15 13:51:43,105 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:43,107 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:43,115 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:43,115 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:43,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:43,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:43,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:43,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:43,180 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61039#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:51:43,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:43,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:43,181 INFO L87 Difference]: Start difference. First operand 99 states and 252 transitions. Second operand 29 states. [2020-09-15 13:51:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:45,258 INFO L93 Difference]: Finished difference Result 125 states and 306 transitions. [2020-09-15 13:51:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:51:45,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:45,260 INFO L225 Difference]: With dead ends: 125 [2020-09-15 13:51:45,260 INFO L226 Difference]: Without dead ends: 119 [2020-09-15 13:51:45,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1400, Invalid=3712, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:51:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-15 13:51:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-09-15 13:51:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 13:51:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 258 transitions. [2020-09-15 13:51:45,263 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 258 transitions. Word has length 32 [2020-09-15 13:51:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:45,263 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 258 transitions. [2020-09-15 13:51:45,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 258 transitions. [2020-09-15 13:51:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:45,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:45,263 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:45,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:45,465 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 153 times [2020-09-15 13:51:45,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:45,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771667929] [2020-09-15 13:51:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:45,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771667929] [2020-09-15 13:51:45,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181296146] [2020-09-15 13:51:45,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:46,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-15 13:51:46,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:46,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:46,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:46,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1700939079] [2020-09-15 13:51:46,095 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:46,103 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:46,112 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:46,112 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:46,112 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:46,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:46,169 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:46,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:46,183 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61574#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:51:46,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:46,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:46,183 INFO L87 Difference]: Start difference. First operand 101 states and 258 transitions. Second operand 29 states. [2020-09-15 13:51:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:48,378 INFO L93 Difference]: Finished difference Result 123 states and 304 transitions. [2020-09-15 13:51:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:51:48,380 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:48,380 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:51:48,381 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:51:48,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1538, Invalid=3864, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:51:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:51:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-09-15 13:51:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 13:51:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 264 transitions. [2020-09-15 13:51:48,383 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 264 transitions. Word has length 32 [2020-09-15 13:51:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:48,383 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 264 transitions. [2020-09-15 13:51:48,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 264 transitions. [2020-09-15 13:51:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:48,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:48,384 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:48,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:48,585 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 154 times [2020-09-15 13:51:48,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:48,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506776180] [2020-09-15 13:51:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:49,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506776180] [2020-09-15 13:51:49,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307338070] [2020-09-15 13:51:49,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:49,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:51:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:49,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [826980496] [2020-09-15 13:51:49,201 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:49,204 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:49,212 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:49,212 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:49,212 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:49,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:49,268 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:49,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:49,282 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62115#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:51:49,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:49,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:49,282 INFO L87 Difference]: Start difference. First operand 103 states and 264 transitions. Second operand 29 states. [2020-09-15 13:51:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:51,623 INFO L93 Difference]: Finished difference Result 123 states and 307 transitions. [2020-09-15 13:51:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:51:51,625 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:51,625 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:51:51,625 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:51:51,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1692, Invalid=4008, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 13:51:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:51:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-09-15 13:51:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 13:51:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 272 transitions. [2020-09-15 13:51:51,628 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 272 transitions. Word has length 32 [2020-09-15 13:51:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:51,629 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 272 transitions. [2020-09-15 13:51:51,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 272 transitions. [2020-09-15 13:51:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:51:51,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:51,629 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:51,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:51,830 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 155 times [2020-09-15 13:51:51,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:51,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711994043] [2020-09-15 13:51:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:52,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711994043] [2020-09-15 13:51:52,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606321858] [2020-09-15 13:51:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:52,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-15 13:51:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-15 13:51:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:52,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:52,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-15 13:51:52,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [644414913] [2020-09-15 13:51:52,461 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:52,464 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:52,472 INFO L274 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-09-15 13:51:52,472 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:52,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:52,472 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:52,526 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:52,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:52,540 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62664#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:51:52,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:51:52,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:52,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:51:52,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:51:52,540 INFO L87 Difference]: Start difference. First operand 105 states and 272 transitions. Second operand 29 states. [2020-09-15 13:51:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:54,941 INFO L93 Difference]: Finished difference Result 123 states and 315 transitions. [2020-09-15 13:51:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-15 13:51:54,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-15 13:51:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:54,942 INFO L225 Difference]: With dead ends: 123 [2020-09-15 13:51:54,942 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 13:51:54,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1860, Invalid=4146, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:51:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 13:51:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-09-15 13:51:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 13:51:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-15 13:51:54,944 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2020-09-15 13:51:54,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:54,944 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-15 13:51:54,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:51:54,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-15 13:51:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:51:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:54,945 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:55,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 13:51:55,146 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 156 times [2020-09-15 13:51:55,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:55,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976484708] [2020-09-15 13:51:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:55,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976484708] [2020-09-15 13:51:55,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406100103] [2020-09-15 13:51:55,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:55,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:51:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:51:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:51:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:55,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:55,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:51:55,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [730469355] [2020-09-15 13:51:55,926 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:55,928 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:55,937 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 53 transitions. [2020-09-15 13:51:55,937 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:55,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:55,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:55,991 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:55,991 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,028 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,036 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,051 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,067 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,104 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:56,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:56,122 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63167#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:51:56,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:51:56,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:51:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:51:56,123 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 30 states. [2020-09-15 13:51:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:57,372 INFO L93 Difference]: Finished difference Result 120 states and 280 transitions. [2020-09-15 13:51:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:51:57,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:51:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:57,373 INFO L225 Difference]: With dead ends: 120 [2020-09-15 13:51:57,373 INFO L226 Difference]: Without dead ends: 114 [2020-09-15 13:51:57,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:51:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-15 13:51:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-15 13:51:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:51:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-15 13:51:57,376 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 33 [2020-09-15 13:51:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:57,376 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-15 13:51:57,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:51:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-15 13:51:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:51:57,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:57,377 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:51:57,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:51:57,578 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:51:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:51:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 157 times [2020-09-15 13:51:57,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:51:57,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418023851] [2020-09-15 13:51:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:51:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:58,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418023851] [2020-09-15 13:51:58,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523344448] [2020-09-15 13:51:58,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:51:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:51:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:51:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:51:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:51:58,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:51:58,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:51:58,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876250225] [2020-09-15 13:51:58,345 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:51:58,347 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:51:58,355 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:51:58,355 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:51:58,356 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:58,356 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:58,409 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:51:58,410 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:51:58,422 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [63639#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:51:58,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:51:58,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:51:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:51:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:51:58,424 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 30 states. [2020-09-15 13:51:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:51:59,798 INFO L93 Difference]: Finished difference Result 172 states and 386 transitions. [2020-09-15 13:51:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:51:59,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:51:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:51:59,801 INFO L225 Difference]: With dead ends: 172 [2020-09-15 13:51:59,801 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 13:51:59,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1005, Invalid=2655, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:51:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 13:51:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2020-09-15 13:51:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 13:51:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 218 transitions. [2020-09-15 13:51:59,804 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 218 transitions. Word has length 33 [2020-09-15 13:51:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:51:59,804 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 218 transitions. [2020-09-15 13:51:59,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:51:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 218 transitions. [2020-09-15 13:51:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:51:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:51:59,805 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:00,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 13:52:00,013 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:00,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:00,014 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 158 times [2020-09-15 13:52:00,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:00,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357106546] [2020-09-15 13:52:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357106546] [2020-09-15 13:52:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369689200] [2020-09-15 13:52:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:00,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:52:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:00,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:00,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:00,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56927034] [2020-09-15 13:52:00,768 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:00,770 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:00,778 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:00,778 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:00,779 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:00,779 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:00,832 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:00,832 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:00,844 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64175#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:52:00,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:00,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:00,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:00,845 INFO L87 Difference]: Start difference. First operand 88 states and 218 transitions. Second operand 30 states. [2020-09-15 13:52:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:02,281 INFO L93 Difference]: Finished difference Result 169 states and 382 transitions. [2020-09-15 13:52:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:52:02,282 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:02,283 INFO L225 Difference]: With dead ends: 169 [2020-09-15 13:52:02,283 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 13:52:02,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1028, Invalid=2878, Unknown=0, NotChecked=0, Total=3906 [2020-09-15 13:52:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 13:52:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 90. [2020-09-15 13:52:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:52:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2020-09-15 13:52:02,286 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 33 [2020-09-15 13:52:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:02,286 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2020-09-15 13:52:02,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2020-09-15 13:52:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:02,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:02,287 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:02,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:02,488 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 159 times [2020-09-15 13:52:02,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:02,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948714200] [2020-09-15 13:52:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:03,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948714200] [2020-09-15 13:52:03,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379396029] [2020-09-15 13:52:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:03,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 13:52:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:03,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:03,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:03,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [505012820] [2020-09-15 13:52:03,211 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:03,213 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:03,221 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:03,221 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:03,222 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:03,222 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:03,273 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:03,273 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:03,285 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [64716#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:52:03,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:03,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:03,286 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand 30 states. [2020-09-15 13:52:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:04,872 INFO L93 Difference]: Finished difference Result 167 states and 380 transitions. [2020-09-15 13:52:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:52:04,873 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:04,873 INFO L225 Difference]: With dead ends: 167 [2020-09-15 13:52:04,873 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 13:52:04,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:52:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 13:52:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2020-09-15 13:52:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 13:52:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 230 transitions. [2020-09-15 13:52:04,877 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 230 transitions. Word has length 33 [2020-09-15 13:52:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:04,877 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 230 transitions. [2020-09-15 13:52:04,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 230 transitions. [2020-09-15 13:52:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:04,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:04,878 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:05,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-15 13:52:05,085 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:05,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 160 times [2020-09-15 13:52:05,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:05,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419554976] [2020-09-15 13:52:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:05,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419554976] [2020-09-15 13:52:05,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771533072] [2020-09-15 13:52:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:05,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:52:05,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:05,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:05,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:05,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:05,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834935320] [2020-09-15 13:52:05,788 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:05,789 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:05,797 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:05,797 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:05,797 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:05,797 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:05,853 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:05,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:05,865 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65263#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:52:05,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:05,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:05,866 INFO L87 Difference]: Start difference. First operand 92 states and 230 transitions. Second operand 30 states. [2020-09-15 13:52:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:07,584 INFO L93 Difference]: Finished difference Result 165 states and 378 transitions. [2020-09-15 13:52:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:52:07,585 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:07,586 INFO L225 Difference]: With dead ends: 165 [2020-09-15 13:52:07,586 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 13:52:07,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1122, Invalid=3300, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 13:52:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 13:52:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 94. [2020-09-15 13:52:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:52:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 236 transitions. [2020-09-15 13:52:07,590 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 236 transitions. Word has length 33 [2020-09-15 13:52:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:07,590 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 236 transitions. [2020-09-15 13:52:07,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 236 transitions. [2020-09-15 13:52:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:07,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:07,591 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:07,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:07,800 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:07,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 161 times [2020-09-15 13:52:07,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:07,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151331522] [2020-09-15 13:52:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:08,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151331522] [2020-09-15 13:52:08,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546917998] [2020-09-15 13:52:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:08,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 13:52:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:08,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:08,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:08,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1160157114] [2020-09-15 13:52:08,483 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:08,485 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:08,493 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:08,493 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:08,496 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:08,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:08,552 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:08,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:08,563 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [65816#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:52:08,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:08,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:08,564 INFO L87 Difference]: Start difference. First operand 94 states and 236 transitions. Second operand 30 states. [2020-09-15 13:52:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:10,401 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2020-09-15 13:52:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:52:10,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:10,403 INFO L225 Difference]: With dead ends: 163 [2020-09-15 13:52:10,403 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 13:52:10,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1193, Invalid=3499, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:52:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 13:52:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 96. [2020-09-15 13:52:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 13:52:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 242 transitions. [2020-09-15 13:52:10,406 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 242 transitions. Word has length 33 [2020-09-15 13:52:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:10,406 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 242 transitions. [2020-09-15 13:52:10,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 242 transitions. [2020-09-15 13:52:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:10,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:10,407 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:10,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:10,607 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:10,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 162 times [2020-09-15 13:52:10,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:10,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774362057] [2020-09-15 13:52:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:11,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774362057] [2020-09-15 13:52:11,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893297205] [2020-09-15 13:52:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:11,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:52:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:11,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:11,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:11,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2064109136] [2020-09-15 13:52:11,288 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:11,289 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:11,297 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:11,297 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:11,298 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:11,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:11,354 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:11,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:11,372 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66375#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:52:11,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:11,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:11,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:11,373 INFO L87 Difference]: Start difference. First operand 96 states and 242 transitions. Second operand 30 states. [2020-09-15 13:52:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:13,704 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2020-09-15 13:52:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:52:13,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:13,705 INFO L225 Difference]: With dead ends: 161 [2020-09-15 13:52:13,705 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 13:52:13,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1280, Invalid=3690, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 13:52:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 13:52:13,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2020-09-15 13:52:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 13:52:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 248 transitions. [2020-09-15 13:52:13,707 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 248 transitions. Word has length 33 [2020-09-15 13:52:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:13,707 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 248 transitions. [2020-09-15 13:52:13,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 248 transitions. [2020-09-15 13:52:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:13,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:13,708 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:13,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:13,909 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 163 times [2020-09-15 13:52:13,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:13,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927939670] [2020-09-15 13:52:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927939670] [2020-09-15 13:52:14,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822668294] [2020-09-15 13:52:14,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:14,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858289723] [2020-09-15 13:52:14,564 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:14,565 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:14,573 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:14,573 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:14,574 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:14,574 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:14,630 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:14,630 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:14,641 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66940#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:52:14,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:14,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:14,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:14,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:14,642 INFO L87 Difference]: Start difference. First operand 98 states and 248 transitions. Second operand 30 states. [2020-09-15 13:52:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:16,708 INFO L93 Difference]: Finished difference Result 159 states and 372 transitions. [2020-09-15 13:52:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:52:16,709 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:16,710 INFO L225 Difference]: With dead ends: 159 [2020-09-15 13:52:16,710 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 13:52:16,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1383, Invalid=3873, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 13:52:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 13:52:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 100. [2020-09-15 13:52:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 13:52:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 254 transitions. [2020-09-15 13:52:16,713 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 254 transitions. Word has length 33 [2020-09-15 13:52:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:16,713 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 254 transitions. [2020-09-15 13:52:16,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 254 transitions. [2020-09-15 13:52:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:16,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:16,714 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:16,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:16,915 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 164 times [2020-09-15 13:52:16,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:16,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964522409] [2020-09-15 13:52:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:17,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964522409] [2020-09-15 13:52:17,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992363754] [2020-09-15 13:52:17,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:17,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:52:17,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:17,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:17,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1515868009] [2020-09-15 13:52:17,575 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:17,577 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:17,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:17,585 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:17,586 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:17,586 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:17,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:17,657 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:17,675 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [67511#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:52:17,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:17,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:17,676 INFO L87 Difference]: Start difference. First operand 100 states and 254 transitions. Second operand 30 states. [2020-09-15 13:52:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:19,870 INFO L93 Difference]: Finished difference Result 157 states and 370 transitions. [2020-09-15 13:52:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:52:19,871 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:19,872 INFO L225 Difference]: With dead ends: 157 [2020-09-15 13:52:19,872 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 13:52:19,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1502, Invalid=4048, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 13:52:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 13:52:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 102. [2020-09-15 13:52:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 13:52:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 260 transitions. [2020-09-15 13:52:19,874 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 260 transitions. Word has length 33 [2020-09-15 13:52:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:19,875 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 260 transitions. [2020-09-15 13:52:19,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 260 transitions. [2020-09-15 13:52:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:19,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:19,875 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:20,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-15 13:52:20,076 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:20,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 165 times [2020-09-15 13:52:20,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:20,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866125028] [2020-09-15 13:52:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:20,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866125028] [2020-09-15 13:52:20,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631332] [2020-09-15 13:52:20,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:20,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 13:52:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:20,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:20,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:20,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1452130809] [2020-09-15 13:52:20,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:20,740 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:20,765 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:20,765 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:20,766 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:20,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:20,822 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:20,822 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:20,841 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68088#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:52:20,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:20,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:20,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:20,842 INFO L87 Difference]: Start difference. First operand 102 states and 260 transitions. Second operand 30 states. [2020-09-15 13:52:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:23,139 INFO L93 Difference]: Finished difference Result 155 states and 368 transitions. [2020-09-15 13:52:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:52:23,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:23,141 INFO L225 Difference]: With dead ends: 155 [2020-09-15 13:52:23,141 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 13:52:23,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1637, Invalid=4215, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 13:52:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 13:52:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2020-09-15 13:52:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 13:52:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 266 transitions. [2020-09-15 13:52:23,144 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 266 transitions. Word has length 33 [2020-09-15 13:52:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:23,145 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 266 transitions. [2020-09-15 13:52:23,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 266 transitions. [2020-09-15 13:52:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:23,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:23,145 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:23,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 13:52:23,346 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:23,347 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 166 times [2020-09-15 13:52:23,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:23,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042732886] [2020-09-15 13:52:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:23,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042732886] [2020-09-15 13:52:23,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326328704] [2020-09-15 13:52:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:23,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:52:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:23,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:23,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:23,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1751520294] [2020-09-15 13:52:23,993 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:23,995 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:24,019 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:24,020 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:24,020 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:24,020 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:24,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:24,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:24,087 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [68671#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:52:24,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:24,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:24,088 INFO L87 Difference]: Start difference. First operand 104 states and 266 transitions. Second operand 30 states. [2020-09-15 13:52:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:26,498 INFO L93 Difference]: Finished difference Result 153 states and 366 transitions. [2020-09-15 13:52:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:52:26,500 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:26,500 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:52:26,500 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:52:26,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1788, Invalid=4374, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 13:52:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:52:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-09-15 13:52:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 13:52:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 272 transitions. [2020-09-15 13:52:26,503 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 272 transitions. Word has length 33 [2020-09-15 13:52:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:26,503 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 272 transitions. [2020-09-15 13:52:26,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 272 transitions. [2020-09-15 13:52:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:26,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:26,503 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:26,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:26,704 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 167 times [2020-09-15 13:52:26,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:26,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726633024] [2020-09-15 13:52:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:27,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726633024] [2020-09-15 13:52:27,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892376287] [2020-09-15 13:52:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:27,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 13:52:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:27,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1644645331] [2020-09-15 13:52:27,389 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:27,391 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:27,399 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:27,399 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:27,400 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:27,400 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:27,454 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:27,454 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:27,470 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69260#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:52:27,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:27,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:27,471 INFO L87 Difference]: Start difference. First operand 106 states and 272 transitions. Second operand 30 states. [2020-09-15 13:52:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:30,003 INFO L93 Difference]: Finished difference Result 153 states and 369 transitions. [2020-09-15 13:52:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:52:30,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:30,005 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:52:30,006 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:52:30,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1873 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1955, Invalid=4525, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 13:52:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:52:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 108. [2020-09-15 13:52:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 13:52:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 280 transitions. [2020-09-15 13:52:30,009 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 280 transitions. Word has length 33 [2020-09-15 13:52:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:30,009 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 280 transitions. [2020-09-15 13:52:30,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 280 transitions. [2020-09-15 13:52:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-15 13:52:30,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:30,009 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:30,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 13:52:30,210 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 168 times [2020-09-15 13:52:30,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:30,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51553870] [2020-09-15 13:52:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:30,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51553870] [2020-09-15 13:52:30,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643281699] [2020-09-15 13:52:30,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:30,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:52:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:30,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-15 13:52:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:30,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:30,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-15 13:52:30,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [724789784] [2020-09-15 13:52:30,906 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:30,908 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:30,918 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-09-15 13:52:30,919 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:30,919 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:30,919 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:30,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:30,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:31,017 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [69857#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:52:31,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-15 13:52:31,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-15 13:52:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:52:31,018 INFO L87 Difference]: Start difference. First operand 108 states and 280 transitions. Second operand 30 states. [2020-09-15 13:52:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:33,619 INFO L93 Difference]: Finished difference Result 154 states and 379 transitions. [2020-09-15 13:52:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-15 13:52:33,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-15 13:52:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:33,621 INFO L225 Difference]: With dead ends: 154 [2020-09-15 13:52:33,621 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 13:52:33,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2136, Invalid=4670, Unknown=0, NotChecked=0, Total=6806 [2020-09-15 13:52:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 13:52:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2020-09-15 13:52:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:52:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-15 13:52:33,627 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 33 [2020-09-15 13:52:33,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:33,627 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-15 13:52:33,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-15 13:52:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-15 13:52:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:33,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:33,628 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:33,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 13:52:33,837 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 169 times [2020-09-15 13:52:33,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:33,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604075351] [2020-09-15 13:52:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:34,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604075351] [2020-09-15 13:52:34,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056385215] [2020-09-15 13:52:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:34,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:34,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:34,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1438596117] [2020-09-15 13:52:34,697 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:34,699 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:34,708 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 50 transitions. [2020-09-15 13:52:34,708 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:34,710 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:34,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:34,767 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:34,767 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:34,782 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70411#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:52:34,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:34,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:34,783 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 31 states. [2020-09-15 13:52:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:36,143 INFO L93 Difference]: Finished difference Result 150 states and 342 transitions. [2020-09-15 13:52:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 13:52:36,145 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:36,146 INFO L225 Difference]: With dead ends: 150 [2020-09-15 13:52:36,146 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 13:52:36,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1007, Invalid=2533, Unknown=0, NotChecked=0, Total=3540 [2020-09-15 13:52:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 13:52:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2020-09-15 13:52:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-15 13:52:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 220 transitions. [2020-09-15 13:52:36,149 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 220 transitions. Word has length 34 [2020-09-15 13:52:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:36,149 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 220 transitions. [2020-09-15 13:52:36,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 220 transitions. [2020-09-15 13:52:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:36,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:36,150 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:36,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-15 13:52:36,358 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 170 times [2020-09-15 13:52:36,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:36,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207871975] [2020-09-15 13:52:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:37,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207871975] [2020-09-15 13:52:37,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468080039] [2020-09-15 13:52:37,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:37,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:52:37,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:37,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:37,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:37,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564180860] [2020-09-15 13:52:37,174 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:37,176 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:37,184 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:37,184 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:37,185 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:37,185 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:37,247 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:37,247 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:37,261 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [70927#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:52:37,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:37,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:37,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:37,262 INFO L87 Difference]: Start difference. First operand 89 states and 220 transitions. Second operand 31 states. [2020-09-15 13:52:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:38,720 INFO L93 Difference]: Finished difference Result 147 states and 338 transitions. [2020-09-15 13:52:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:52:38,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:38,722 INFO L225 Difference]: With dead ends: 147 [2020-09-15 13:52:38,722 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 13:52:38,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1015, Invalid=2767, Unknown=0, NotChecked=0, Total=3782 [2020-09-15 13:52:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 13:52:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 91. [2020-09-15 13:52:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 13:52:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 226 transitions. [2020-09-15 13:52:38,724 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 226 transitions. Word has length 34 [2020-09-15 13:52:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:38,725 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 226 transitions. [2020-09-15 13:52:38,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 226 transitions. [2020-09-15 13:52:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:38,725 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:38,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:38,926 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 171 times [2020-09-15 13:52:38,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:38,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325277570] [2020-09-15 13:52:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:39,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325277570] [2020-09-15 13:52:39,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062087912] [2020-09-15 13:52:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:39,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 13:52:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:39,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:39,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:39,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1067476774] [2020-09-15 13:52:39,746 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:39,748 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:39,757 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:39,757 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:39,758 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:39,758 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:39,816 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:39,816 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:39,829 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71448#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:52:39,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:39,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:39,830 INFO L87 Difference]: Start difference. First operand 91 states and 226 transitions. Second operand 31 states. [2020-09-15 13:52:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:41,426 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-15 13:52:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:52:41,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:41,427 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:52:41,427 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:52:41,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1039, Invalid=2993, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 13:52:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:52:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 93. [2020-09-15 13:52:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 13:52:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 232 transitions. [2020-09-15 13:52:41,430 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 232 transitions. Word has length 34 [2020-09-15 13:52:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:41,430 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 232 transitions. [2020-09-15 13:52:41,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 232 transitions. [2020-09-15 13:52:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:41,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:41,431 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:41,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 13:52:41,632 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 172 times [2020-09-15 13:52:41,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:41,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402899154] [2020-09-15 13:52:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:42,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402899154] [2020-09-15 13:52:42,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740820065] [2020-09-15 13:52:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:42,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:52:42,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:42,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:42,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:42,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1148181166] [2020-09-15 13:52:42,392 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:42,394 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:42,403 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:42,403 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:42,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:42,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:42,463 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:42,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:42,476 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [71975#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:52:42,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:42,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:42,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:42,477 INFO L87 Difference]: Start difference. First operand 93 states and 232 transitions. Second operand 31 states. [2020-09-15 13:52:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:44,166 INFO L93 Difference]: Finished difference Result 143 states and 334 transitions. [2020-09-15 13:52:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:52:44,167 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:44,167 INFO L225 Difference]: With dead ends: 143 [2020-09-15 13:52:44,168 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 13:52:44,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1079, Invalid=3211, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 13:52:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 13:52:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 95. [2020-09-15 13:52:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 13:52:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 238 transitions. [2020-09-15 13:52:44,171 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 238 transitions. Word has length 34 [2020-09-15 13:52:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:44,171 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 238 transitions. [2020-09-15 13:52:44,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 238 transitions. [2020-09-15 13:52:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:44,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:44,172 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:44,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:44,373 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 173 times [2020-09-15 13:52:44,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:44,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116580298] [2020-09-15 13:52:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:45,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116580298] [2020-09-15 13:52:45,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708210456] [2020-09-15 13:52:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:45,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 13:52:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:45,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:45,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:45,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1425252101] [2020-09-15 13:52:45,119 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:45,121 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:45,154 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:45,154 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:45,155 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:45,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:45,214 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:45,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:45,228 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [72508#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:52:45,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:45,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:45,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:45,229 INFO L87 Difference]: Start difference. First operand 95 states and 238 transitions. Second operand 31 states. [2020-09-15 13:52:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:47,085 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-15 13:52:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:52:47,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:47,086 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:52:47,086 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 13:52:47,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1135, Invalid=3421, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 13:52:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 13:52:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 97. [2020-09-15 13:52:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 13:52:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 244 transitions. [2020-09-15 13:52:47,089 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 244 transitions. Word has length 34 [2020-09-15 13:52:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:47,089 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 244 transitions. [2020-09-15 13:52:47,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 244 transitions. [2020-09-15 13:52:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:47,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:47,089 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:47,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:47,290 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 174 times [2020-09-15 13:52:47,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:47,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199179004] [2020-09-15 13:52:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:47,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199179004] [2020-09-15 13:52:47,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891824272] [2020-09-15 13:52:47,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:48,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:52:48,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:48,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:48,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:48,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:48,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1891206183] [2020-09-15 13:52:48,045 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:48,046 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:48,055 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:48,055 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:48,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:48,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:48,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:48,114 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:48,133 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73047#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:52:48,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:48,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:48,134 INFO L87 Difference]: Start difference. First operand 97 states and 244 transitions. Second operand 31 states. [2020-09-15 13:52:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:50,442 INFO L93 Difference]: Finished difference Result 139 states and 330 transitions. [2020-09-15 13:52:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:52:50,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:50,444 INFO L225 Difference]: With dead ends: 139 [2020-09-15 13:52:50,444 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 13:52:50,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1207, Invalid=3623, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:52:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 13:52:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-15 13:52:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 13:52:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 250 transitions. [2020-09-15 13:52:50,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 250 transitions. Word has length 34 [2020-09-15 13:52:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:50,447 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 250 transitions. [2020-09-15 13:52:50,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 250 transitions. [2020-09-15 13:52:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:50,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:50,448 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:50,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:50,649 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 175 times [2020-09-15 13:52:50,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:50,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575214592] [2020-09-15 13:52:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:51,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575214592] [2020-09-15 13:52:51,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427454340] [2020-09-15 13:52:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:51,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:51,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:51,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [728668676] [2020-09-15 13:52:51,365 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:51,367 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:51,376 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:51,376 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:51,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:51,378 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:51,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:51,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:51,449 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [73592#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:52:51,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:51,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:51,450 INFO L87 Difference]: Start difference. First operand 99 states and 250 transitions. Second operand 31 states. [2020-09-15 13:52:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:53,575 INFO L93 Difference]: Finished difference Result 137 states and 328 transitions. [2020-09-15 13:52:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:52:53,577 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:53,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:53,577 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:52:53,577 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:52:53,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1295, Invalid=3817, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:52:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:52:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-15 13:52:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 13:52:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2020-09-15 13:52:53,580 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 34 [2020-09-15 13:52:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:53,581 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2020-09-15 13:52:53,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2020-09-15 13:52:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:53,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:53,581 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:53,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:52:53,782 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 176 times [2020-09-15 13:52:53,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:53,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339909928] [2020-09-15 13:52:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:54,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339909928] [2020-09-15 13:52:54,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282110596] [2020-09-15 13:52:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:54,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:52:54,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:54,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:54,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:54,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1348181452] [2020-09-15 13:52:54,511 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:54,513 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:54,524 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:54,525 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:54,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:54,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:54,588 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:54,588 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:54,600 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74143#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:52:54,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:54,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:54,602 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand 31 states. [2020-09-15 13:52:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:52:56,827 INFO L93 Difference]: Finished difference Result 135 states and 326 transitions. [2020-09-15 13:52:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:52:56,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:52:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:52:56,829 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:52:56,829 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:52:56,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1399, Invalid=4003, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:52:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:52:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 103. [2020-09-15 13:52:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 13:52:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2020-09-15 13:52:56,832 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 34 [2020-09-15 13:52:56,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:52:56,833 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2020-09-15 13:52:56,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:52:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2020-09-15 13:52:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:52:56,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:52:56,833 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:52:57,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-15 13:52:57,034 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:52:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:52:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 177 times [2020-09-15 13:52:57,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:52:57,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027882614] [2020-09-15 13:52:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:52:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:52:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:57,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027882614] [2020-09-15 13:52:57,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658729878] [2020-09-15 13:52:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:52:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-15 13:52:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:52:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:52:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:52:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:52:57,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:52:57,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:52:57,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [816476696] [2020-09-15 13:52:57,739 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:52:57,741 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:52:57,750 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:52:57,750 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:52:57,752 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:57,752 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:57,813 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:52:57,813 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:52:57,827 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [74700#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:52:57,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:52:57,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:52:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:52:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:52:57,828 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand 31 states. [2020-09-15 13:53:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:00,179 INFO L93 Difference]: Finished difference Result 133 states and 324 transitions. [2020-09-15 13:53:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:53:00,181 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:53:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:00,181 INFO L225 Difference]: With dead ends: 133 [2020-09-15 13:53:00,181 INFO L226 Difference]: Without dead ends: 127 [2020-09-15 13:53:00,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1519, Invalid=4181, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 13:53:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-15 13:53:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2020-09-15 13:53:00,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 13:53:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 268 transitions. [2020-09-15 13:53:00,184 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 268 transitions. Word has length 34 [2020-09-15 13:53:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:00,184 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 268 transitions. [2020-09-15 13:53:00,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:53:00,184 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 268 transitions. [2020-09-15 13:53:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:53:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:00,185 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:00,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 13:53:00,387 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:00,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 178 times [2020-09-15 13:53:00,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:00,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639425592] [2020-09-15 13:53:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:00,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639425592] [2020-09-15 13:53:00,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629685570] [2020-09-15 13:53:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:01,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:53:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:01,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:53:01,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:01,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:01,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:53:01,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313325623] [2020-09-15 13:53:01,098 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:01,100 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:01,109 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:53:01,109 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:01,111 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:01,111 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:01,172 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:01,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:01,190 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75263#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:53:01,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:53:01,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:53:01,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:53:01,191 INFO L87 Difference]: Start difference. First operand 105 states and 268 transitions. Second operand 31 states. [2020-09-15 13:53:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:03,671 INFO L93 Difference]: Finished difference Result 131 states and 322 transitions. [2020-09-15 13:53:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:53:03,672 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:53:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:03,673 INFO L225 Difference]: With dead ends: 131 [2020-09-15 13:53:03,673 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 13:53:03,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1655, Invalid=4351, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:53:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 13:53:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2020-09-15 13:53:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 13:53:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 274 transitions. [2020-09-15 13:53:03,676 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 274 transitions. Word has length 34 [2020-09-15 13:53:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:03,676 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 274 transitions. [2020-09-15 13:53:03,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:53:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 274 transitions. [2020-09-15 13:53:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:53:03,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:03,677 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:03,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 13:53:03,878 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:03,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:03,878 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 179 times [2020-09-15 13:53:03,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:03,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110611705] [2020-09-15 13:53:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:04,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110611705] [2020-09-15 13:53:04,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440972727] [2020-09-15 13:53:04,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:04,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-15 13:53:04,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:53:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:04,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:04,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:53:04,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1198847434] [2020-09-15 13:53:04,608 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:04,610 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:04,619 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:53:04,619 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:04,621 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:04,621 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:04,689 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:04,689 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:04,730 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [75832#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:53:04,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:53:04,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:53:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:53:04,732 INFO L87 Difference]: Start difference. First operand 107 states and 274 transitions. Second operand 31 states. [2020-09-15 13:53:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:07,373 INFO L93 Difference]: Finished difference Result 129 states and 320 transitions. [2020-09-15 13:53:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:53:07,374 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:53:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:07,375 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:53:07,375 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:53:07,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1807, Invalid=4513, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 13:53:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:53:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 109. [2020-09-15 13:53:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 13:53:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 280 transitions. [2020-09-15 13:53:07,378 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 280 transitions. Word has length 34 [2020-09-15 13:53:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:07,378 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 280 transitions. [2020-09-15 13:53:07,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:53:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 280 transitions. [2020-09-15 13:53:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:53:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:07,378 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:07,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:07,579 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 180 times [2020-09-15 13:53:07,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:07,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952960304] [2020-09-15 13:53:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:08,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952960304] [2020-09-15 13:53:08,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108952775] [2020-09-15 13:53:08,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:08,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:53:08,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:53:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:08,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:08,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:53:08,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [545873689] [2020-09-15 13:53:08,294 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:08,296 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:08,306 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:53:08,306 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:08,306 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:08,306 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:08,365 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:08,366 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:08,381 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76407#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:53:08,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:53:08,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:53:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:53:08,381 INFO L87 Difference]: Start difference. First operand 109 states and 280 transitions. Second operand 31 states. [2020-09-15 13:53:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:11,139 INFO L93 Difference]: Finished difference Result 129 states and 323 transitions. [2020-09-15 13:53:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:53:11,140 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:53:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:11,141 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:53:11,141 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:53:11,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1975, Invalid=4667, Unknown=0, NotChecked=0, Total=6642 [2020-09-15 13:53:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:53:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 111. [2020-09-15 13:53:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 13:53:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 288 transitions. [2020-09-15 13:53:11,144 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 288 transitions. Word has length 34 [2020-09-15 13:53:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:11,144 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 288 transitions. [2020-09-15 13:53:11,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:53:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 288 transitions. [2020-09-15 13:53:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-15 13:53:11,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:11,145 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:11,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:11,346 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 181 times [2020-09-15 13:53:11,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:11,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212566439] [2020-09-15 13:53:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:11,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212566439] [2020-09-15 13:53:11,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958062678] [2020-09-15 13:53:11,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-15 13:53:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:12,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:12,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-15 13:53:12,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1694227319] [2020-09-15 13:53:12,062 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:12,064 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:12,073 INFO L274 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-09-15 13:53:12,073 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:12,074 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:12,074 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:12,132 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:12,132 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:12,147 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [76990#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:53:12,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-15 13:53:12,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:12,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-15 13:53:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:53:12,148 INFO L87 Difference]: Start difference. First operand 111 states and 288 transitions. Second operand 31 states. [2020-09-15 13:53:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:15,038 INFO L93 Difference]: Finished difference Result 129 states and 331 transitions. [2020-09-15 13:53:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-15 13:53:15,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-15 13:53:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:15,040 INFO L225 Difference]: With dead ends: 129 [2020-09-15 13:53:15,040 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 13:53:15,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2157, Invalid=4815, Unknown=0, NotChecked=0, Total=6972 [2020-09-15 13:53:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 13:53:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2020-09-15 13:53:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 13:53:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-09-15 13:53:15,043 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 34 [2020-09-15 13:53:15,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:15,043 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-09-15 13:53:15,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-15 13:53:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-09-15 13:53:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:15,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:15,044 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:15,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:15,245 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 182 times [2020-09-15 13:53:15,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:15,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942221628] [2020-09-15 13:53:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942221628] [2020-09-15 13:53:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102385771] [2020-09-15 13:53:16,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:16,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:53:16,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:16,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:16,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:16,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423803863] [2020-09-15 13:53:16,157 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:16,159 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:16,169 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-15 13:53:16,169 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:16,170 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,220 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,259 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,260 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,279 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,280 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,285 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,324 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,325 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,335 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:16,335 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:16,347 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [77523#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:53:16,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:16,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:16,348 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 32 states. [2020-09-15 13:53:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:17,833 INFO L93 Difference]: Finished difference Result 126 states and 294 transitions. [2020-09-15 13:53:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:53:17,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:17,835 INFO L225 Difference]: With dead ends: 126 [2020-09-15 13:53:17,835 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 13:53:17,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1081, Invalid=2579, Unknown=0, NotChecked=0, Total=3660 [2020-09-15 13:53:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 13:53:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-09-15 13:53:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:53:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-15 13:53:17,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 35 [2020-09-15 13:53:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:17,838 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-15 13:53:17,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-15 13:53:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:17,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:17,839 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:18,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:18,040 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 183 times [2020-09-15 13:53:18,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:18,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822800868] [2020-09-15 13:53:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:18,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822800868] [2020-09-15 13:53:18,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477595252] [2020-09-15 13:53:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-15 13:53:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:18,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:18,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:18,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [293178445] [2020-09-15 13:53:18,960 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:18,962 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:18,973 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:18,973 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:18,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:18,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:19,036 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:19,036 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:19,049 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78021#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:53:19,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:19,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:19,050 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 32 states. [2020-09-15 13:53:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:20,667 INFO L93 Difference]: Finished difference Result 182 states and 408 transitions. [2020-09-15 13:53:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:53:20,668 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:20,668 INFO L225 Difference]: With dead ends: 182 [2020-09-15 13:53:20,668 INFO L226 Difference]: Without dead ends: 176 [2020-09-15 13:53:20,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1148, Invalid=3012, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:53:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-15 13:53:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2020-09-15 13:53:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 13:53:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2020-09-15 13:53:20,672 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 35 [2020-09-15 13:53:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:20,672 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2020-09-15 13:53:20,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2020-09-15 13:53:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:20,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:20,672 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:20,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:20,873 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:20,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 184 times [2020-09-15 13:53:20,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:20,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831683914] [2020-09-15 13:53:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:21,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831683914] [2020-09-15 13:53:21,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946333676] [2020-09-15 13:53:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:21,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:53:21,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:21,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:21,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [541613852] [2020-09-15 13:53:21,753 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:21,756 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:21,764 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:21,764 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:21,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:21,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:21,824 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:21,825 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:21,838 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [78587#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:53:21,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:21,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:21,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:21,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:21,839 INFO L87 Difference]: Start difference. First operand 92 states and 228 transitions. Second operand 32 states. [2020-09-15 13:53:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:23,548 INFO L93 Difference]: Finished difference Result 179 states and 404 transitions. [2020-09-15 13:53:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:53:23,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:23,550 INFO L225 Difference]: With dead ends: 179 [2020-09-15 13:53:23,550 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 13:53:23,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1169, Invalid=3253, Unknown=0, NotChecked=0, Total=4422 [2020-09-15 13:53:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 13:53:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2020-09-15 13:53:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:53:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 234 transitions. [2020-09-15 13:53:23,552 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 234 transitions. Word has length 35 [2020-09-15 13:53:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:23,552 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 234 transitions. [2020-09-15 13:53:23,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 234 transitions. [2020-09-15 13:53:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:23,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:23,553 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:23,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:23,756 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 185 times [2020-09-15 13:53:23,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:23,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327036292] [2020-09-15 13:53:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:24,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327036292] [2020-09-15 13:53:24,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981193008] [2020-09-15 13:53:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:24,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-15 13:53:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:24,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:24,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:24,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [387834609] [2020-09-15 13:53:24,580 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:24,582 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:24,603 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:24,603 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:24,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:24,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:24,669 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:24,669 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:24,682 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79158#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:53:24,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:24,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:24,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:24,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:24,683 INFO L87 Difference]: Start difference. First operand 94 states and 234 transitions. Second operand 32 states. [2020-09-15 13:53:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:26,533 INFO L93 Difference]: Finished difference Result 177 states and 402 transitions. [2020-09-15 13:53:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:53:26,535 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:26,535 INFO L225 Difference]: With dead ends: 177 [2020-09-15 13:53:26,535 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 13:53:26,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1206, Invalid=3486, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:53:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 13:53:26,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 96. [2020-09-15 13:53:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 13:53:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 240 transitions. [2020-09-15 13:53:26,538 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 240 transitions. Word has length 35 [2020-09-15 13:53:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:26,538 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 240 transitions. [2020-09-15 13:53:26,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 240 transitions. [2020-09-15 13:53:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:26,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:26,539 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:26,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:26,740 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 186 times [2020-09-15 13:53:26,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:26,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376662365] [2020-09-15 13:53:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376662365] [2020-09-15 13:53:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186445603] [2020-09-15 13:53:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:27,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-15 13:53:27,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:27,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:27,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:27,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [700187364] [2020-09-15 13:53:27,585 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:27,587 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:27,596 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:27,596 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:27,599 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:27,600 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:27,678 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:27,679 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:27,692 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [79735#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:53:27,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:27,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:27,693 INFO L87 Difference]: Start difference. First operand 96 states and 240 transitions. Second operand 32 states. [2020-09-15 13:53:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:29,679 INFO L93 Difference]: Finished difference Result 175 states and 400 transitions. [2020-09-15 13:53:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:53:29,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:29,680 INFO L225 Difference]: With dead ends: 175 [2020-09-15 13:53:29,680 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 13:53:29,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1259, Invalid=3711, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 13:53:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 13:53:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2020-09-15 13:53:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 13:53:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 246 transitions. [2020-09-15 13:53:29,683 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 246 transitions. Word has length 35 [2020-09-15 13:53:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:29,683 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 246 transitions. [2020-09-15 13:53:29,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 246 transitions. [2020-09-15 13:53:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:29,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:29,684 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:29,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:29,885 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:29,886 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 187 times [2020-09-15 13:53:29,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:29,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381153458] [2020-09-15 13:53:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:30,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381153458] [2020-09-15 13:53:30,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504109609] [2020-09-15 13:53:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:30,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:30,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:30,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:30,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1985931997] [2020-09-15 13:53:30,701 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:30,704 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:30,715 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:30,715 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:30,719 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:30,719 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:30,775 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:30,776 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:30,786 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80318#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:53:30,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:30,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:30,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:30,787 INFO L87 Difference]: Start difference. First operand 98 states and 246 transitions. Second operand 32 states. [2020-09-15 13:53:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:32,912 INFO L93 Difference]: Finished difference Result 173 states and 398 transitions. [2020-09-15 13:53:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:53:32,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:32,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:32,913 INFO L225 Difference]: With dead ends: 173 [2020-09-15 13:53:32,914 INFO L226 Difference]: Without dead ends: 167 [2020-09-15 13:53:32,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1328, Invalid=3928, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 13:53:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-15 13:53:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 100. [2020-09-15 13:53:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 13:53:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 252 transitions. [2020-09-15 13:53:32,917 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 252 transitions. Word has length 35 [2020-09-15 13:53:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:32,917 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 252 transitions. [2020-09-15 13:53:32,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 252 transitions. [2020-09-15 13:53:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:32,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:32,918 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:33,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:33,119 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 805590871, now seen corresponding path program 188 times [2020-09-15 13:53:33,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:33,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979036696] [2020-09-15 13:53:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:33,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979036696] [2020-09-15 13:53:33,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58388794] [2020-09-15 13:53:33,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:33,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:53:33,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:33,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:33,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:33,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [232370270] [2020-09-15 13:53:33,943 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:33,945 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:33,954 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:33,954 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:33,954 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:33,954 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:34,031 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:34,032 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:34,045 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [80907#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:53:34,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:34,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:34,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:34,045 INFO L87 Difference]: Start difference. First operand 100 states and 252 transitions. Second operand 32 states. [2020-09-15 13:53:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:36,273 INFO L93 Difference]: Finished difference Result 171 states and 396 transitions. [2020-09-15 13:53:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:53:36,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:36,275 INFO L225 Difference]: With dead ends: 171 [2020-09-15 13:53:36,276 INFO L226 Difference]: Without dead ends: 165 [2020-09-15 13:53:36,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1413, Invalid=4137, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 13:53:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-15 13:53:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 102. [2020-09-15 13:53:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 13:53:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 258 transitions. [2020-09-15 13:53:36,278 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 258 transitions. Word has length 35 [2020-09-15 13:53:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:36,279 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 258 transitions. [2020-09-15 13:53:36,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 258 transitions. [2020-09-15 13:53:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:36,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:36,279 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:36,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 13:53:36,480 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash 47318841, now seen corresponding path program 189 times [2020-09-15 13:53:36,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:36,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262380636] [2020-09-15 13:53:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262380636] [2020-09-15 13:53:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606629281] [2020-09-15 13:53:37,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:37,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-15 13:53:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:37,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:37,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:37,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [362152110] [2020-09-15 13:53:37,290 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:37,292 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:37,301 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:37,301 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:37,304 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:37,304 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:37,364 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:37,365 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:37,376 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [81502#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:53:37,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:37,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:37,377 INFO L87 Difference]: Start difference. First operand 102 states and 258 transitions. Second operand 32 states. [2020-09-15 13:53:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:39,779 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-15 13:53:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:53:39,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:39,780 INFO L225 Difference]: With dead ends: 169 [2020-09-15 13:53:39,780 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 13:53:39,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 13:53:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 13:53:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2020-09-15 13:53:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 13:53:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-09-15 13:53:39,783 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 35 [2020-09-15 13:53:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:39,783 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-09-15 13:53:39,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-09-15 13:53:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:39,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:39,784 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:39,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:39,990 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:39,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1683077221, now seen corresponding path program 190 times [2020-09-15 13:53:39,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:39,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43479591] [2020-09-15 13:53:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:40,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43479591] [2020-09-15 13:53:40,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115400296] [2020-09-15 13:53:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:40,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:53:40,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:40,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:40,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:40,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [65350866] [2020-09-15 13:53:40,789 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:40,791 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:40,801 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:40,801 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:40,804 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:40,804 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:40,868 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:40,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:40,880 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82103#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:53:40,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:40,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:40,881 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 32 states. [2020-09-15 13:53:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:43,423 INFO L93 Difference]: Finished difference Result 167 states and 392 transitions. [2020-09-15 13:53:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:53:43,424 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:43,425 INFO L225 Difference]: With dead ends: 167 [2020-09-15 13:53:43,425 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 13:53:43,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1631, Invalid=4531, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 13:53:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 13:53:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 106. [2020-09-15 13:53:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 13:53:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-09-15 13:53:43,429 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 35 [2020-09-15 13:53:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:43,429 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-09-15 13:53:43,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-09-15 13:53:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:43,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:43,430 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:43,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-15 13:53:43,633 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:43,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1979922557, now seen corresponding path program 191 times [2020-09-15 13:53:43,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:43,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331223848] [2020-09-15 13:53:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:44,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331223848] [2020-09-15 13:53:44,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060975844] [2020-09-15 13:53:44,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:44,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-15 13:53:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:44,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:44,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1275350552] [2020-09-15 13:53:44,437 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:44,439 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:44,448 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:44,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:44,451 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:44,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:44,512 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:44,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:44,527 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [82710#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:53:44,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:44,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:44,528 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 32 states. [2020-09-15 13:53:47,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:47,203 INFO L93 Difference]: Finished difference Result 165 states and 390 transitions. [2020-09-15 13:53:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:53:47,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:47,206 INFO L225 Difference]: With dead ends: 165 [2020-09-15 13:53:47,206 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 13:53:47,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1764, Invalid=4716, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 13:53:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 13:53:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2020-09-15 13:53:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 13:53:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 276 transitions. [2020-09-15 13:53:47,209 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 276 transitions. Word has length 35 [2020-09-15 13:53:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:47,209 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 276 transitions. [2020-09-15 13:53:47,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 276 transitions. [2020-09-15 13:53:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:47,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:47,210 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:47,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:47,410 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:47,411 INFO L82 PathProgramCache]: Analyzing trace with hash 558037471, now seen corresponding path program 192 times [2020-09-15 13:53:47,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:47,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587992895] [2020-09-15 13:53:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:48,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587992895] [2020-09-15 13:53:48,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872414059] [2020-09-15 13:53:48,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:48,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-15 13:53:48,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:48,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:48,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:48,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [937031203] [2020-09-15 13:53:48,196 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:48,198 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:48,398 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:48,399 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:48,399 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:48,399 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:48,461 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:48,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:48,475 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83323#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:53:48,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:48,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:48,477 INFO L87 Difference]: Start difference. First operand 108 states and 276 transitions. Second operand 32 states. [2020-09-15 13:53:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:51,255 INFO L93 Difference]: Finished difference Result 163 states and 388 transitions. [2020-09-15 13:53:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:53:51,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:51,257 INFO L225 Difference]: With dead ends: 163 [2020-09-15 13:53:51,257 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 13:53:51,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1913, Invalid=4893, Unknown=0, NotChecked=0, Total=6806 [2020-09-15 13:53:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 13:53:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-09-15 13:53:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 13:53:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 282 transitions. [2020-09-15 13:53:51,259 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 282 transitions. Word has length 35 [2020-09-15 13:53:51,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:51,260 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 282 transitions. [2020-09-15 13:53:51,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 282 transitions. [2020-09-15 13:53:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:51,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:51,260 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:51,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:51,461 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:51,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1561875519, now seen corresponding path program 193 times [2020-09-15 13:53:51,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:51,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141638448] [2020-09-15 13:53:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:52,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141638448] [2020-09-15 13:53:52,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962805046] [2020-09-15 13:53:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:52,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:52,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:52,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195549181] [2020-09-15 13:53:52,255 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:52,269 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:52,278 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:52,278 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:52,279 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:52,279 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:52,340 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:52,340 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:52,354 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [83942#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:53:52,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:52,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:52,355 INFO L87 Difference]: Start difference. First operand 110 states and 282 transitions. Second operand 32 states. [2020-09-15 13:53:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:55,304 INFO L93 Difference]: Finished difference Result 161 states and 386 transitions. [2020-09-15 13:53:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:53:55,305 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:55,306 INFO L225 Difference]: With dead ends: 161 [2020-09-15 13:53:55,306 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 13:53:55,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2078, Invalid=5062, Unknown=0, NotChecked=0, Total=7140 [2020-09-15 13:53:55,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 13:53:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2020-09-15 13:53:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 13:53:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 288 transitions. [2020-09-15 13:53:55,309 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 288 transitions. Word has length 35 [2020-09-15 13:53:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:55,309 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 288 transitions. [2020-09-15 13:53:55,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 288 transitions. [2020-09-15 13:53:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:55,309 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:55,310 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:55,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-15 13:53:55,510 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1483959843, now seen corresponding path program 194 times [2020-09-15 13:53:55,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:55,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600297408] [2020-09-15 13:53:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:53:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:56,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600297408] [2020-09-15 13:53:56,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117426311] [2020-09-15 13:53:56,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:53:56,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:53:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:53:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:53:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:53:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:53:56,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:53:56,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:53:56,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1264834852] [2020-09-15 13:53:56,293 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:53:56,308 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:53:56,316 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:53:56,317 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:53:56,317 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:56,317 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:56,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:53:56,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:53:56,426 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [84567#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:53:56,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:53:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:53:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:53:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:53:56,427 INFO L87 Difference]: Start difference. First operand 112 states and 288 transitions. Second operand 32 states. [2020-09-15 13:53:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:53:59,474 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-09-15 13:53:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:53:59,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:53:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:53:59,475 INFO L225 Difference]: With dead ends: 161 [2020-09-15 13:53:59,475 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 13:53:59,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2259, Invalid=5223, Unknown=0, NotChecked=0, Total=7482 [2020-09-15 13:53:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 13:53:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2020-09-15 13:53:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 13:53:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 296 transitions. [2020-09-15 13:53:59,478 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 296 transitions. Word has length 35 [2020-09-15 13:53:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:53:59,478 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 296 transitions. [2020-09-15 13:53:59,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:53:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 296 transitions. [2020-09-15 13:53:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:53:59,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:53:59,478 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:53:59,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:53:59,679 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:53:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:53:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1500537093, now seen corresponding path program 195 times [2020-09-15 13:53:59,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:53:59,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997436908] [2020-09-15 13:53:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:53:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:00,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997436908] [2020-09-15 13:54:00,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737501577] [2020-09-15 13:54:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:00,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-15 13:54:00,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:00,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-15 13:54:00,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:00,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:00,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-09-15 13:54:00,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1433158669] [2020-09-15 13:54:00,488 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:00,491 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:00,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-09-15 13:54:00,516 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:00,517 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:00,517 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:00,579 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:00,579 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:00,594 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85200#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:54:00,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:54:00,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:54:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:54:00,595 INFO L87 Difference]: Start difference. First operand 114 states and 296 transitions. Second operand 32 states. [2020-09-15 13:54:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:03,674 INFO L93 Difference]: Finished difference Result 162 states and 399 transitions. [2020-09-15 13:54:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-15 13:54:03,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-09-15 13:54:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:03,676 INFO L225 Difference]: With dead ends: 162 [2020-09-15 13:54:03,676 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 13:54:03,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2454, Invalid=5378, Unknown=0, NotChecked=0, Total=7832 [2020-09-15 13:54:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 13:54:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2020-09-15 13:54:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:54:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-15 13:54:03,679 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 35 [2020-09-15 13:54:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:03,680 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-15 13:54:03,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:54:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-15 13:54:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:03,680 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:03,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:03,881 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash 581302646, now seen corresponding path program 196 times [2020-09-15 13:54:03,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:03,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743446186] [2020-09-15 13:54:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:04,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743446186] [2020-09-15 13:54:04,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28286108] [2020-09-15 13:54:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:04,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:54:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:04,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:04,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:04,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431757566] [2020-09-15 13:54:04,869 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:04,871 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:04,880 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 52 transitions. [2020-09-15 13:54:04,881 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:04,881 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:04,881 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:04,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:04,972 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:04,990 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [85786#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:54:04,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:04,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:04,991 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 33 states. [2020-09-15 13:54:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:06,579 INFO L93 Difference]: Finished difference Result 158 states and 360 transitions. [2020-09-15 13:54:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 13:54:06,580 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:06,581 INFO L225 Difference]: With dead ends: 158 [2020-09-15 13:54:06,581 INFO L226 Difference]: Without dead ends: 152 [2020-09-15 13:54:06,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1152, Invalid=2880, Unknown=0, NotChecked=0, Total=4032 [2020-09-15 13:54:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-15 13:54:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 93. [2020-09-15 13:54:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-15 13:54:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 230 transitions. [2020-09-15 13:54:06,595 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 230 transitions. Word has length 36 [2020-09-15 13:54:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:06,595 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 230 transitions. [2020-09-15 13:54:06,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 230 transitions. [2020-09-15 13:54:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:06,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:06,596 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:06,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:06,797 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1259398744, now seen corresponding path program 197 times [2020-09-15 13:54:06,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:06,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319662637] [2020-09-15 13:54:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:07,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319662637] [2020-09-15 13:54:07,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806806188] [2020-09-15 13:54:07,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:07,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-15 13:54:07,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:07,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:07,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:07,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831234968] [2020-09-15 13:54:07,777 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:07,779 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:07,788 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:07,789 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:07,789 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:07,789 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:07,858 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:07,859 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:07,876 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86330#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:54:07,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:07,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:07,877 INFO L87 Difference]: Start difference. First operand 93 states and 230 transitions. Second operand 33 states. [2020-09-15 13:54:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:09,622 INFO L93 Difference]: Finished difference Result 155 states and 356 transitions. [2020-09-15 13:54:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:54:09,624 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:09,624 INFO L225 Difference]: With dead ends: 155 [2020-09-15 13:54:09,625 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 13:54:09,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1158, Invalid=3132, Unknown=0, NotChecked=0, Total=4290 [2020-09-15 13:54:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 13:54:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 95. [2020-09-15 13:54:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 13:54:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 236 transitions. [2020-09-15 13:54:09,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 236 transitions. Word has length 36 [2020-09-15 13:54:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:09,628 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 236 transitions. [2020-09-15 13:54:09,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 236 transitions. [2020-09-15 13:54:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:09,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:09,629 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:09,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-15 13:54:09,838 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1984584774, now seen corresponding path program 198 times [2020-09-15 13:54:09,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:09,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26223363] [2020-09-15 13:54:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:10,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26223363] [2020-09-15 13:54:10,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777862976] [2020-09-15 13:54:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:10,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-15 13:54:10,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:10,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:10,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:10,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336505181] [2020-09-15 13:54:10,835 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:10,837 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:10,846 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:10,846 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:10,848 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:10,848 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:10,915 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:10,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:10,930 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [86879#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:54:10,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:10,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:10,931 INFO L87 Difference]: Start difference. First operand 95 states and 236 transitions. Second operand 33 states. [2020-09-15 13:54:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:12,800 INFO L93 Difference]: Finished difference Result 153 states and 354 transitions. [2020-09-15 13:54:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:54:12,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:12,802 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:54:12,802 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:54:12,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 13:54:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:54:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 97. [2020-09-15 13:54:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 13:54:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 242 transitions. [2020-09-15 13:54:12,805 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 242 transitions. Word has length 36 [2020-09-15 13:54:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:12,805 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 242 transitions. [2020-09-15 13:54:12,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 242 transitions. [2020-09-15 13:54:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:12,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:12,806 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:13,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 13:54:13,006 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash -338800228, now seen corresponding path program 199 times [2020-09-15 13:54:13,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:13,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744096562] [2020-09-15 13:54:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:13,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744096562] [2020-09-15 13:54:13,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285733678] [2020-09-15 13:54:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:13,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:13,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:13,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472241393] [2020-09-15 13:54:13,929 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:13,933 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:13,945 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:13,945 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:13,946 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:13,946 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:14,010 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:14,011 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:14,026 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87434#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:54:14,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:14,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:14,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:14,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:14,027 INFO L87 Difference]: Start difference. First operand 97 states and 242 transitions. Second operand 33 states. [2020-09-15 13:54:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:16,070 INFO L93 Difference]: Finished difference Result 151 states and 352 transitions. [2020-09-15 13:54:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:54:16,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:16,072 INFO L225 Difference]: With dead ends: 151 [2020-09-15 13:54:16,072 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 13:54:16,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1218, Invalid=3612, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:54:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 13:54:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 99. [2020-09-15 13:54:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 13:54:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 248 transitions. [2020-09-15 13:54:16,075 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 248 transitions. Word has length 36 [2020-09-15 13:54:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:16,075 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 248 transitions. [2020-09-15 13:54:16,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 248 transitions. [2020-09-15 13:54:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:16,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:16,076 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:16,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:16,277 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash -962785282, now seen corresponding path program 200 times [2020-09-15 13:54:16,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:16,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620212982] [2020-09-15 13:54:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:17,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620212982] [2020-09-15 13:54:17,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786154681] [2020-09-15 13:54:17,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:17,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:54:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:17,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:17,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:17,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1521200684] [2020-09-15 13:54:17,212 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:17,214 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:17,223 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:17,224 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:17,224 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:17,224 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:17,294 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:17,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:17,310 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [87995#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:54:17,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:17,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:17,311 INFO L87 Difference]: Start difference. First operand 99 states and 248 transitions. Second operand 33 states. [2020-09-15 13:54:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:19,501 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-15 13:54:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:54:19,502 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:19,503 INFO L225 Difference]: With dead ends: 149 [2020-09-15 13:54:19,503 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 13:54:19,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1272, Invalid=3840, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:54:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 13:54:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2020-09-15 13:54:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 13:54:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 254 transitions. [2020-09-15 13:54:19,507 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 254 transitions. Word has length 36 [2020-09-15 13:54:19,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:19,507 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 254 transitions. [2020-09-15 13:54:19,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 254 transitions. [2020-09-15 13:54:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:19,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:19,508 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:19,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 13:54:19,715 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 426508000, now seen corresponding path program 201 times [2020-09-15 13:54:19,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:19,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627033492] [2020-09-15 13:54:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:20,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627033492] [2020-09-15 13:54:20,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592689269] [2020-09-15 13:54:20,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:20,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-15 13:54:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:20,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:20,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:20,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:20,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1657829642] [2020-09-15 13:54:20,629 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:20,631 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:20,641 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:20,641 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:20,641 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:20,642 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:20,707 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:20,707 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:20,724 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [88562#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:54:20,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:20,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:20,725 INFO L87 Difference]: Start difference. First operand 101 states and 254 transitions. Second operand 33 states. [2020-09-15 13:54:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:23,076 INFO L93 Difference]: Finished difference Result 147 states and 348 transitions. [2020-09-15 13:54:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:54:23,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:23,078 INFO L225 Difference]: With dead ends: 147 [2020-09-15 13:54:23,078 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 13:54:23,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1342, Invalid=4060, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:54:23,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 13:54:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2020-09-15 13:54:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 13:54:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 260 transitions. [2020-09-15 13:54:23,080 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 260 transitions. Word has length 36 [2020-09-15 13:54:23,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:23,081 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 260 transitions. [2020-09-15 13:54:23,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:23,081 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 260 transitions. [2020-09-15 13:54:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:23,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:23,082 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:23,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-15 13:54:23,290 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1871527490, now seen corresponding path program 202 times [2020-09-15 13:54:23,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:23,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031623025] [2020-09-15 13:54:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:24,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031623025] [2020-09-15 13:54:24,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462688961] [2020-09-15 13:54:24,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:24,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:54:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:24,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:24,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:24,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035806678] [2020-09-15 13:54:24,173 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:24,175 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:24,185 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:24,186 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:24,186 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:24,186 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:24,251 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:24,251 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:24,267 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89135#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:54:24,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:24,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:24,267 INFO L87 Difference]: Start difference. First operand 103 states and 260 transitions. Second operand 33 states. [2020-09-15 13:54:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:26,731 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-15 13:54:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:54:26,733 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:26,734 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:54:26,734 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:54:26,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 13:54:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:54:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 105. [2020-09-15 13:54:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 13:54:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 266 transitions. [2020-09-15 13:54:26,737 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 266 transitions. Word has length 36 [2020-09-15 13:54:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:26,737 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 266 transitions. [2020-09-15 13:54:26,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 266 transitions. [2020-09-15 13:54:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:26,737 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:26,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 13:54:26,938 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1113255460, now seen corresponding path program 203 times [2020-09-15 13:54:26,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:26,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9286482] [2020-09-15 13:54:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:27,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9286482] [2020-09-15 13:54:27,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554368881] [2020-09-15 13:54:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:27,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-15 13:54:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:27,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:27,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:27,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:27,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1690085065] [2020-09-15 13:54:27,816 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:27,819 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:27,828 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:27,828 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:27,828 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:27,828 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:27,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:27,894 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:27,931 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [89714#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:54:27,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:27,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:27,932 INFO L87 Difference]: Start difference. First operand 105 states and 266 transitions. Second operand 33 states. [2020-09-15 13:54:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:30,576 INFO L93 Difference]: Finished difference Result 143 states and 344 transitions. [2020-09-15 13:54:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:54:30,577 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:30,578 INFO L225 Difference]: With dead ends: 143 [2020-09-15 13:54:30,578 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 13:54:30,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1530, Invalid=4476, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:54:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 13:54:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 107. [2020-09-15 13:54:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 13:54:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 272 transitions. [2020-09-15 13:54:30,581 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 272 transitions. Word has length 36 [2020-09-15 13:54:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:30,581 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 272 transitions. [2020-09-15 13:54:30,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 272 transitions. [2020-09-15 13:54:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:30,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:30,581 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:30,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:30,782 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -617140602, now seen corresponding path program 204 times [2020-09-15 13:54:30,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:30,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005320263] [2020-09-15 13:54:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:31,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005320263] [2020-09-15 13:54:31,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51266736] [2020-09-15 13:54:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:31,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-15 13:54:31,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:31,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:31,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:31,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:31,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [734411849] [2020-09-15 13:54:31,641 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:31,643 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:31,652 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:31,652 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:31,653 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:31,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:31,721 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:31,722 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:31,737 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90299#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:54:31,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:31,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:31,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:31,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:31,738 INFO L87 Difference]: Start difference. First operand 107 states and 272 transitions. Second operand 33 states. [2020-09-15 13:54:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:34,544 INFO L93 Difference]: Finished difference Result 141 states and 342 transitions. [2020-09-15 13:54:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:54:34,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:34,546 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:54:34,546 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 13:54:34,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1648, Invalid=4672, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 13:54:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 13:54:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2020-09-15 13:54:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 13:54:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 278 transitions. [2020-09-15 13:54:34,549 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 278 transitions. Word has length 36 [2020-09-15 13:54:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:34,549 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 278 transitions. [2020-09-15 13:54:34,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 278 transitions. [2020-09-15 13:54:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:34,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:34,550 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:34,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 13:54:34,751 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1249108120, now seen corresponding path program 205 times [2020-09-15 13:54:34,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:34,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155356180] [2020-09-15 13:54:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:35,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155356180] [2020-09-15 13:54:35,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937059892] [2020-09-15 13:54:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:35,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:35,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:35,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1947459434] [2020-09-15 13:54:35,605 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:35,608 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:35,619 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:35,619 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:35,619 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:35,620 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:35,685 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:35,685 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:35,710 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [90890#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:54:35,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:35,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:35,711 INFO L87 Difference]: Start difference. First operand 109 states and 278 transitions. Second operand 33 states. [2020-09-15 13:54:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:38,626 INFO L93 Difference]: Finished difference Result 139 states and 340 transitions. [2020-09-15 13:54:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:54:38,628 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:38,628 INFO L225 Difference]: With dead ends: 139 [2020-09-15 13:54:38,628 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 13:54:38,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1782, Invalid=4860, Unknown=0, NotChecked=0, Total=6642 [2020-09-15 13:54:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 13:54:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2020-09-15 13:54:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 13:54:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 284 transitions. [2020-09-15 13:54:38,632 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 284 transitions. Word has length 36 [2020-09-15 13:54:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:38,632 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 284 transitions. [2020-09-15 13:54:38,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 284 transitions. [2020-09-15 13:54:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:38,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:38,633 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:38,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:38,840 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1623974090, now seen corresponding path program 206 times [2020-09-15 13:54:38,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:38,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551624910] [2020-09-15 13:54:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:39,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551624910] [2020-09-15 13:54:39,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147929450] [2020-09-15 13:54:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:39,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:54:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:39,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:39,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:39,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:39,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:39,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [105842341] [2020-09-15 13:54:39,724 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:39,727 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:39,737 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:39,738 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:39,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:39,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:39,809 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:39,810 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:39,862 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [91487#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:54:39,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:39,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:39,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:39,864 INFO L87 Difference]: Start difference. First operand 111 states and 284 transitions. Second operand 33 states. [2020-09-15 13:54:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:42,971 INFO L93 Difference]: Finished difference Result 137 states and 338 transitions. [2020-09-15 13:54:42,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:54:42,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:42,973 INFO L225 Difference]: With dead ends: 137 [2020-09-15 13:54:42,973 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 13:54:42,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1932, Invalid=5040, Unknown=0, NotChecked=0, Total=6972 [2020-09-15 13:54:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 13:54:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2020-09-15 13:54:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-15 13:54:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 290 transitions. [2020-09-15 13:54:42,976 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 290 transitions. Word has length 36 [2020-09-15 13:54:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:42,976 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 290 transitions. [2020-09-15 13:54:42,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 290 transitions. [2020-09-15 13:54:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:42,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:42,976 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:43,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:43,177 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash -495938900, now seen corresponding path program 207 times [2020-09-15 13:54:43,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:43,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582681651] [2020-09-15 13:54:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:43,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582681651] [2020-09-15 13:54:43,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076166873] [2020-09-15 13:54:43,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:44,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-09-15 13:54:44,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:44,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:44,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:44,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:44,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:44,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472314624] [2020-09-15 13:54:44,069 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:44,071 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:44,082 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:44,082 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:44,084 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:44,084 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:44,152 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:44,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:44,168 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92090#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:54:44,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:44,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:44,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:44,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:44,169 INFO L87 Difference]: Start difference. First operand 113 states and 290 transitions. Second operand 33 states. [2020-09-15 13:54:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:47,446 INFO L93 Difference]: Finished difference Result 135 states and 336 transitions. [2020-09-15 13:54:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:54:47,447 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:47,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:47,448 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:54:47,448 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:54:47,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2098, Invalid=5212, Unknown=0, NotChecked=0, Total=7310 [2020-09-15 13:54:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:54:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2020-09-15 13:54:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-15 13:54:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 296 transitions. [2020-09-15 13:54:47,450 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 296 transitions. Word has length 36 [2020-09-15 13:54:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:47,451 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 296 transitions. [2020-09-15 13:54:47,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 296 transitions. [2020-09-15 13:54:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:47,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:47,451 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:47,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2020-09-15 13:54:47,652 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1745070834, now seen corresponding path program 208 times [2020-09-15 13:54:47,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:47,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013150227] [2020-09-15 13:54:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:48,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013150227] [2020-09-15 13:54:48,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259468275] [2020-09-15 13:54:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:48,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:54:48,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:48,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:48,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:48,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:48,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:48,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [63148083] [2020-09-15 13:54:48,535 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:48,537 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:48,571 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:48,571 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:48,572 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:48,572 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:48,639 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:48,639 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:48,654 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [92699#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:54:48,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:48,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:48,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:48,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:48,655 INFO L87 Difference]: Start difference. First operand 115 states and 296 transitions. Second operand 33 states. [2020-09-15 13:54:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:52,128 INFO L93 Difference]: Finished difference Result 135 states and 339 transitions. [2020-09-15 13:54:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:54:52,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:52,130 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:54:52,130 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:54:52,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2280, Invalid=5376, Unknown=0, NotChecked=0, Total=7656 [2020-09-15 13:54:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:54:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2020-09-15 13:54:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-15 13:54:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 304 transitions. [2020-09-15 13:54:52,134 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 304 transitions. Word has length 36 [2020-09-15 13:54:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:52,134 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 304 transitions. [2020-09-15 13:54:52,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 304 transitions. [2020-09-15 13:54:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-15 13:54:52,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:52,135 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:52,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:54:52,335 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1728493584, now seen corresponding path program 209 times [2020-09-15 13:54:52,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:52,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707219164] [2020-09-15 13:54:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:53,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707219164] [2020-09-15 13:54:53,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274510414] [2020-09-15 13:54:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:53,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-15 13:54:53,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:53,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2020-09-15 13:54:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:53,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:53,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-09-15 13:54:53,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1898783841] [2020-09-15 13:54:53,224 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:53,227 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:53,240 INFO L274 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-09-15 13:54:53,240 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:53,242 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:53,243 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:53,316 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:53,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:53,331 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93316#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-15 13:54:53,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-15 13:54:53,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-15 13:54:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:54:53,332 INFO L87 Difference]: Start difference. First operand 117 states and 304 transitions. Second operand 33 states. [2020-09-15 13:54:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:54:56,936 INFO L93 Difference]: Finished difference Result 135 states and 347 transitions. [2020-09-15 13:54:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-15 13:54:56,938 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-09-15 13:54:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:54:56,938 INFO L225 Difference]: With dead ends: 135 [2020-09-15 13:54:56,938 INFO L226 Difference]: Without dead ends: 123 [2020-09-15 13:54:56,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2476, Invalid=5534, Unknown=0, NotChecked=0, Total=8010 [2020-09-15 13:54:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-15 13:54:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 86. [2020-09-15 13:54:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-15 13:54:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2020-09-15 13:54:56,941 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 36 [2020-09-15 13:54:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:54:56,941 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2020-09-15 13:54:56,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-15 13:54:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2020-09-15 13:54:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:54:56,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:54:56,941 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:54:57,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-15 13:54:57,142 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:54:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:54:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1876764150, now seen corresponding path program 210 times [2020-09-15 13:54:57,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:54:57,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861453723] [2020-09-15 13:54:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:54:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:54:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:58,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861453723] [2020-09-15 13:54:58,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143115780] [2020-09-15 13:54:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:54:58,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:54:58,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:54:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:54:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:54:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:54:58,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:54:58,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:54:58,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117211931] [2020-09-15 13:54:58,250 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:54:58,253 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:54:58,264 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 57 transitions. [2020-09-15 13:54:58,264 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:54:58,265 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,329 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,329 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,388 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,388 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,399 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,420 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,484 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:54:58,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:54:58,496 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [93879#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:54:58,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:54:58,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:54:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:54:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:54:58,497 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand 34 states. [2020-09-15 13:55:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:00,224 INFO L93 Difference]: Finished difference Result 132 states and 308 transitions. [2020-09-15 13:55:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:55:00,226 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:00,226 INFO L225 Difference]: With dead ends: 132 [2020-09-15 13:55:00,226 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 13:55:00,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1232, Invalid=2928, Unknown=0, NotChecked=0, Total=4160 [2020-09-15 13:55:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 13:55:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-15 13:55:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:55:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-15 13:55:00,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 37 [2020-09-15 13:55:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:00,229 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-15 13:55:00,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-15 13:55:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:00,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:00,230 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:00,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 13:55:00,431 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1233524332, now seen corresponding path program 211 times [2020-09-15 13:55:00,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:00,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366927051] [2020-09-15 13:55:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:01,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366927051] [2020-09-15 13:55:01,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860193016] [2020-09-15 13:55:01,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:01,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:01,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:01,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383723877] [2020-09-15 13:55:01,538 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:01,541 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:01,550 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:01,551 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:01,551 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:01,551 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:01,667 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:01,668 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:01,688 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94403#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:55:01,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:01,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:01,690 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 34 states. [2020-09-15 13:55:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:03,683 INFO L93 Difference]: Finished difference Result 192 states and 430 transitions. [2020-09-15 13:55:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:55:03,685 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:03,686 INFO L225 Difference]: With dead ends: 192 [2020-09-15 13:55:03,686 INFO L226 Difference]: Without dead ends: 186 [2020-09-15 13:55:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1301, Invalid=3391, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:55:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-15 13:55:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 96. [2020-09-15 13:55:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 13:55:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-15 13:55:03,689 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 37 [2020-09-15 13:55:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:03,689 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-15 13:55:03,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-15 13:55:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:03,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:03,690 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:03,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:55:03,892 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1911620430, now seen corresponding path program 212 times [2020-09-15 13:55:03,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:03,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665315277] [2020-09-15 13:55:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:04,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665315277] [2020-09-15 13:55:04,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082788474] [2020-09-15 13:55:04,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:05,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:55:05,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:05,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:05,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:05,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:05,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:05,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059651410] [2020-09-15 13:55:05,085 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:05,089 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:05,101 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:05,101 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:05,104 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:05,105 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:05,183 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:05,183 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:05,203 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [94999#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:55:05,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:05,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:05,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:05,204 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 34 states. [2020-09-15 13:55:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:07,343 INFO L93 Difference]: Finished difference Result 189 states and 426 transitions. [2020-09-15 13:55:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:55:07,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:07,345 INFO L225 Difference]: With dead ends: 189 [2020-09-15 13:55:07,345 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 13:55:07,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1320, Invalid=3650, Unknown=0, NotChecked=0, Total=4970 [2020-09-15 13:55:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 13:55:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 98. [2020-09-15 13:55:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 13:55:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 244 transitions. [2020-09-15 13:55:07,348 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 244 transitions. Word has length 37 [2020-09-15 13:55:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:07,348 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 244 transitions. [2020-09-15 13:55:07,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 244 transitions. [2020-09-15 13:55:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:07,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:07,348 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:07,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 13:55:07,549 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1332363088, now seen corresponding path program 213 times [2020-09-15 13:55:07,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:07,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778261781] [2020-09-15 13:55:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:08,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778261781] [2020-09-15 13:55:08,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946524158] [2020-09-15 13:55:08,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:08,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:55:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:08,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:08,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:08,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:08,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [700943787] [2020-09-15 13:55:08,614 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:08,617 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:08,631 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:08,632 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:08,632 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:08,632 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:08,711 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:08,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:08,726 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [95600#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:55:08,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:08,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:08,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:08,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:08,727 INFO L87 Difference]: Start difference. First operand 98 states and 244 transitions. Second operand 34 states. [2020-09-15 13:55:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:10,882 INFO L93 Difference]: Finished difference Result 187 states and 424 transitions. [2020-09-15 13:55:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:55:10,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:10,884 INFO L225 Difference]: With dead ends: 187 [2020-09-15 13:55:10,884 INFO L226 Difference]: Without dead ends: 181 [2020-09-15 13:55:10,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1355, Invalid=3901, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 13:55:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-15 13:55:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 100. [2020-09-15 13:55:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 13:55:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 250 transitions. [2020-09-15 13:55:10,887 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 250 transitions. Word has length 37 [2020-09-15 13:55:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:10,887 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 250 transitions. [2020-09-15 13:55:10,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 250 transitions. [2020-09-15 13:55:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:10,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:10,888 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:11,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:55:11,089 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash 313421458, now seen corresponding path program 214 times [2020-09-15 13:55:11,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:11,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275788165] [2020-09-15 13:55:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275788165] [2020-09-15 13:55:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269799874] [2020-09-15 13:55:12,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:12,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:55:12,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:12,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:12,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:12,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:12,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259505003] [2020-09-15 13:55:12,099 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:12,102 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:12,111 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:12,111 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:12,112 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:12,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:12,183 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:12,184 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:12,199 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96207#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:55:12,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:12,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:12,200 INFO L87 Difference]: Start difference. First operand 100 states and 250 transitions. Second operand 34 states. [2020-09-15 13:55:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:14,610 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2020-09-15 13:55:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:55:14,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:14,612 INFO L225 Difference]: With dead ends: 185 [2020-09-15 13:55:14,612 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 13:55:14,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1406, Invalid=4144, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 13:55:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 13:55:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2020-09-15 13:55:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 13:55:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 256 transitions. [2020-09-15 13:55:14,615 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 256 transitions. Word has length 37 [2020-09-15 13:55:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:14,615 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 256 transitions. [2020-09-15 13:55:14,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 256 transitions. [2020-09-15 13:55:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:14,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:14,616 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:14,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 13:55:14,817 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash -310563596, now seen corresponding path program 215 times [2020-09-15 13:55:14,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:14,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974034959] [2020-09-15 13:55:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:15,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974034959] [2020-09-15 13:55:15,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909773380] [2020-09-15 13:55:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:15,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-15 13:55:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:15,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:15,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:15,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1873257438] [2020-09-15 13:55:15,822 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:15,824 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:15,833 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:15,834 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:15,834 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:15,834 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:15,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:15,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:15,924 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [96820#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:55:15,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:15,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:15,925 INFO L87 Difference]: Start difference. First operand 102 states and 256 transitions. Second operand 34 states. [2020-09-15 13:55:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:18,430 INFO L93 Difference]: Finished difference Result 183 states and 420 transitions. [2020-09-15 13:55:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:55:18,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:18,432 INFO L225 Difference]: With dead ends: 183 [2020-09-15 13:55:18,432 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 13:55:18,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1473, Invalid=4379, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 13:55:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 13:55:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 104. [2020-09-15 13:55:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 13:55:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 262 transitions. [2020-09-15 13:55:18,436 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 262 transitions. Word has length 37 [2020-09-15 13:55:18,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:18,436 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 262 transitions. [2020-09-15 13:55:18,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 262 transitions. [2020-09-15 13:55:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:18,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:18,437 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:18,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:55:18,645 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1078729686, now seen corresponding path program 216 times [2020-09-15 13:55:18,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:18,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369615841] [2020-09-15 13:55:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369615841] [2020-09-15 13:55:19,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637316473] [2020-09-15 13:55:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:19,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:55:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:19,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:19,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:19,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [501806359] [2020-09-15 13:55:19,658 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:19,660 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:19,670 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:19,670 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:19,670 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:19,670 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:19,743 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:19,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:19,759 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [97439#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:55:19,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:19,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:19,760 INFO L87 Difference]: Start difference. First operand 104 states and 262 transitions. Second operand 34 states. [2020-09-15 13:55:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:22,435 INFO L93 Difference]: Finished difference Result 181 states and 418 transitions. [2020-09-15 13:55:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:55:22,436 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:22,437 INFO L225 Difference]: With dead ends: 181 [2020-09-15 13:55:22,437 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 13:55:22,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1556, Invalid=4606, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 13:55:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 13:55:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 106. [2020-09-15 13:55:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 13:55:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 268 transitions. [2020-09-15 13:55:22,440 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 268 transitions. Word has length 37 [2020-09-15 13:55:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:22,441 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 268 transitions. [2020-09-15 13:55:22,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 268 transitions. [2020-09-15 13:55:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:22,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:22,441 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:22,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 13:55:22,642 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1771218120, now seen corresponding path program 217 times [2020-09-15 13:55:22,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:22,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538489808] [2020-09-15 13:55:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:23,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538489808] [2020-09-15 13:55:23,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941938663] [2020-09-15 13:55:23,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:23,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:23,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:23,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:23,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2043069702] [2020-09-15 13:55:23,625 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:23,627 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:23,637 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:23,637 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:23,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:23,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:23,709 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:23,709 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:23,724 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98064#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:55:23,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:23,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:23,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:23,725 INFO L87 Difference]: Start difference. First operand 106 states and 268 transitions. Second operand 34 states. [2020-09-15 13:55:26,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:26,587 INFO L93 Difference]: Finished difference Result 179 states and 416 transitions. [2020-09-15 13:55:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:55:26,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:26,589 INFO L225 Difference]: With dead ends: 179 [2020-09-15 13:55:26,590 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 13:55:26,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1655, Invalid=4825, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 13:55:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 13:55:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 108. [2020-09-15 13:55:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 13:55:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 274 transitions. [2020-09-15 13:55:26,593 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 274 transitions. Word has length 37 [2020-09-15 13:55:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:26,593 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 274 transitions. [2020-09-15 13:55:26,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 274 transitions. [2020-09-15 13:55:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:26,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:26,593 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:26,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2020-09-15 13:55:26,794 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1765477146, now seen corresponding path program 218 times [2020-09-15 13:55:26,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:26,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494971968] [2020-09-15 13:55:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:27,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494971968] [2020-09-15 13:55:27,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231969495] [2020-09-15 13:55:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:27,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:55:27,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:27,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:27,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:27,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [171253611] [2020-09-15 13:55:27,732 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:27,734 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:27,743 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:27,743 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:27,746 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:27,746 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:27,819 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:27,819 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:27,832 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [98695#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:55:27,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:27,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:27,834 INFO L87 Difference]: Start difference. First operand 108 states and 274 transitions. Second operand 34 states. [2020-09-15 13:55:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:30,801 INFO L93 Difference]: Finished difference Result 177 states and 414 transitions. [2020-09-15 13:55:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:55:30,803 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:30,803 INFO L225 Difference]: With dead ends: 177 [2020-09-15 13:55:30,804 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 13:55:30,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1770, Invalid=5036, Unknown=0, NotChecked=0, Total=6806 [2020-09-15 13:55:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 13:55:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 110. [2020-09-15 13:55:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 13:55:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 280 transitions. [2020-09-15 13:55:30,807 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 280 transitions. Word has length 37 [2020-09-15 13:55:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:30,807 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 280 transitions. [2020-09-15 13:55:30,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 280 transitions. [2020-09-15 13:55:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:30,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:30,807 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:31,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:55:31,008 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 35081084, now seen corresponding path program 219 times [2020-09-15 13:55:31,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:31,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606134245] [2020-09-15 13:55:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:31,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606134245] [2020-09-15 13:55:31,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535396534] [2020-09-15 13:55:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:31,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:55:31,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:31,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:31,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:31,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346868530] [2020-09-15 13:55:31,968 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:31,971 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:31,981 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:31,981 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:31,984 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:31,984 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:32,058 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:32,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:32,072 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99332#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:55:32,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:32,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:32,073 INFO L87 Difference]: Start difference. First operand 110 states and 280 transitions. Second operand 34 states. [2020-09-15 13:55:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:35,223 INFO L93 Difference]: Finished difference Result 175 states and 412 transitions. [2020-09-15 13:55:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:55:35,225 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:35,226 INFO L225 Difference]: With dead ends: 175 [2020-09-15 13:55:35,226 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 13:55:35,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1901, Invalid=5239, Unknown=0, NotChecked=0, Total=7140 [2020-09-15 13:55:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 13:55:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2020-09-15 13:55:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 13:55:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 286 transitions. [2020-09-15 13:55:35,229 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 286 transitions. Word has length 37 [2020-09-15 13:55:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:35,229 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 286 transitions. [2020-09-15 13:55:35,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 286 transitions. [2020-09-15 13:55:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:35,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:35,229 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:35,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2020-09-15 13:55:35,430 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -596886434, now seen corresponding path program 220 times [2020-09-15 13:55:35,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:35,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460985615] [2020-09-15 13:55:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:36,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460985615] [2020-09-15 13:55:36,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941050523] [2020-09-15 13:55:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:36,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:55:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:36,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:36,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:36,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [201326047] [2020-09-15 13:55:36,362 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:36,365 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:36,375 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:36,375 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:36,375 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:36,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:36,444 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:36,444 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:36,461 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [99975#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:55:36,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:36,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:36,462 INFO L87 Difference]: Start difference. First operand 112 states and 286 transitions. Second operand 34 states. [2020-09-15 13:55:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:39,711 INFO L93 Difference]: Finished difference Result 173 states and 410 transitions. [2020-09-15 13:55:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:55:39,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:39,714 INFO L225 Difference]: With dead ends: 173 [2020-09-15 13:55:39,714 INFO L226 Difference]: Without dead ends: 167 [2020-09-15 13:55:39,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2048, Invalid=5434, Unknown=0, NotChecked=0, Total=7482 [2020-09-15 13:55:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-15 13:55:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-09-15 13:55:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 13:55:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 292 transitions. [2020-09-15 13:55:39,718 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 292 transitions. Word has length 37 [2020-09-15 13:55:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:39,718 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 292 transitions. [2020-09-15 13:55:39,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 292 transitions. [2020-09-15 13:55:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:39,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:39,718 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:39,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 13:55:39,919 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2018771520, now seen corresponding path program 221 times [2020-09-15 13:55:39,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:39,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455790067] [2020-09-15 13:55:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:40,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455790067] [2020-09-15 13:55:40,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953905920] [2020-09-15 13:55:40,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:40,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-15 13:55:40,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:40,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:40,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:40,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1925870886] [2020-09-15 13:55:40,871 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:40,874 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:40,883 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:40,883 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:40,883 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:40,883 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:40,952 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:40,953 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:40,969 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [100624#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:55:40,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:40,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:40,970 INFO L87 Difference]: Start difference. First operand 114 states and 292 transitions. Second operand 34 states. [2020-09-15 13:55:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:44,412 INFO L93 Difference]: Finished difference Result 171 states and 408 transitions. [2020-09-15 13:55:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:55:44,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:44,414 INFO L225 Difference]: With dead ends: 171 [2020-09-15 13:55:44,414 INFO L226 Difference]: Without dead ends: 165 [2020-09-15 13:55:44,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2211, Invalid=5621, Unknown=0, NotChecked=0, Total=7832 [2020-09-15 13:55:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-15 13:55:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2020-09-15 13:55:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-15 13:55:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 298 transitions. [2020-09-15 13:55:44,418 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 298 transitions. Word has length 37 [2020-09-15 13:55:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:44,418 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 298 transitions. [2020-09-15 13:55:44,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 298 transitions. [2020-09-15 13:55:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:44,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:44,419 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:44,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:55:44,625 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 156282786, now seen corresponding path program 222 times [2020-09-15 13:55:44,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:44,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425404762] [2020-09-15 13:55:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:45,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425404762] [2020-09-15 13:55:45,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032292504] [2020-09-15 13:55:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:45,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:55:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:45,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:45,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:45,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1232845442] [2020-09-15 13:55:45,573 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:45,576 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:45,585 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:45,585 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:45,585 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:45,585 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:45,655 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:45,655 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:45,671 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101279#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:55:45,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:45,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:45,673 INFO L87 Difference]: Start difference. First operand 116 states and 298 transitions. Second operand 34 states. [2020-09-15 13:55:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:49,288 INFO L93 Difference]: Finished difference Result 169 states and 406 transitions. [2020-09-15 13:55:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 13:55:49,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:49,290 INFO L225 Difference]: With dead ends: 169 [2020-09-15 13:55:49,290 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 13:55:49,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2390, Invalid=5800, Unknown=0, NotChecked=0, Total=8190 [2020-09-15 13:55:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 13:55:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-15 13:55:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 13:55:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 304 transitions. [2020-09-15 13:55:49,294 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 304 transitions. Word has length 37 [2020-09-15 13:55:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:49,294 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 304 transitions. [2020-09-15 13:55:49,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 304 transitions. [2020-09-15 13:55:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:49,295 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:49,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 13:55:49,503 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:49,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1092849148, now seen corresponding path program 223 times [2020-09-15 13:55:49,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:49,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470764135] [2020-09-15 13:55:49,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:50,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470764135] [2020-09-15 13:55:50,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408153996] [2020-09-15 13:55:50,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:50,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:50,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:50,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:50,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1549342935] [2020-09-15 13:55:50,555 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:50,558 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:50,568 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:50,568 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:50,569 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:50,569 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:50,663 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:50,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:50,680 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [101940#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:55:50,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:50,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:50,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:50,681 INFO L87 Difference]: Start difference. First operand 118 states and 304 transitions. Second operand 34 states. [2020-09-15 13:55:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:54,525 INFO L93 Difference]: Finished difference Result 169 states and 409 transitions. [2020-09-15 13:55:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-15 13:55:54,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:54,527 INFO L225 Difference]: With dead ends: 169 [2020-09-15 13:55:54,527 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 13:55:54,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2585, Invalid=5971, Unknown=0, NotChecked=0, Total=8556 [2020-09-15 13:55:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 13:55:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2020-09-15 13:55:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 13:55:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2020-09-15 13:55:54,530 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 37 [2020-09-15 13:55:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:54,530 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2020-09-15 13:55:54,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2020-09-15 13:55:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-15 13:55:54,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:54,531 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:55:54,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-15 13:55:54,732 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:55:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:55:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1076271898, now seen corresponding path program 224 times [2020-09-15 13:55:54,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:55:54,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573411007] [2020-09-15 13:55:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:55:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:55:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:55,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573411007] [2020-09-15 13:55:55,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251905455] [2020-09-15 13:55:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:55:55,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:55:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:55:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2020-09-15 13:55:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:55:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:55:55,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:55:55,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2020-09-15 13:55:55,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1298134473] [2020-09-15 13:55:55,736 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:55:55,739 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:55:55,750 INFO L274 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-09-15 13:55:55,750 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:55:55,753 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:55,753 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:55,825 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:55:55,825 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:55:55,839 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [102609#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:55:55,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:55:55,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:55:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:55:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:55:55,840 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand 34 states. [2020-09-15 13:55:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:55:59,810 INFO L93 Difference]: Finished difference Result 170 states and 419 transitions. [2020-09-15 13:55:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-15 13:55:59,811 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-09-15 13:55:59,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:55:59,812 INFO L225 Difference]: With dead ends: 170 [2020-09-15 13:55:59,812 INFO L226 Difference]: Without dead ends: 158 [2020-09-15 13:55:59,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2794, Invalid=6136, Unknown=0, NotChecked=0, Total=8930 [2020-09-15 13:55:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-15 13:55:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-15 13:55:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:55:59,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-09-15 13:55:59,816 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2020-09-15 13:55:59,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:55:59,816 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-09-15 13:55:59,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:55:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-09-15 13:55:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:55:59,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:55:59,817 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:00,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 13:56:00,022 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 286110261, now seen corresponding path program 225 times [2020-09-15 13:56:00,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:00,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400924901] [2020-09-15 13:56:00,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:01,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400924901] [2020-09-15 13:56:01,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760160611] [2020-09-15 13:56:01,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:01,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:56:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:01,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:01,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:01,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157873565] [2020-09-15 13:56:01,263 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:01,266 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:01,277 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 54 transitions. [2020-09-15 13:56:01,277 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:01,282 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:01,282 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:01,362 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:01,362 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:01,380 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103227#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:56:01,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:01,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:01,381 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 35 states. [2020-09-15 13:56:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:03,308 INFO L93 Difference]: Finished difference Result 166 states and 378 transitions. [2020-09-15 13:56:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 13:56:03,310 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:03,311 INFO L225 Difference]: With dead ends: 166 [2020-09-15 13:56:03,311 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 13:56:03,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1307, Invalid=3249, Unknown=0, NotChecked=0, Total=4556 [2020-09-15 13:56:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 13:56:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2020-09-15 13:56:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 13:56:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 240 transitions. [2020-09-15 13:56:03,315 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 240 transitions. Word has length 38 [2020-09-15 13:56:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:03,315 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 240 transitions. [2020-09-15 13:56:03,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 240 transitions. [2020-09-15 13:56:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:03,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:03,315 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:03,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:56:03,516 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -898568553, now seen corresponding path program 226 times [2020-09-15 13:56:03,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:03,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566361844] [2020-09-15 13:56:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:04,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566361844] [2020-09-15 13:56:04,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609416132] [2020-09-15 13:56:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:04,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:56:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:04,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:04,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:04,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1697060298] [2020-09-15 13:56:04,715 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:04,718 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:04,728 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:04,728 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:04,730 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:04,730 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:04,811 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:04,812 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:04,828 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [103799#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:56:04,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:04,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:04,830 INFO L87 Difference]: Start difference. First operand 97 states and 240 transitions. Second operand 35 states. [2020-09-15 13:56:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:06,919 INFO L93 Difference]: Finished difference Result 163 states and 374 transitions. [2020-09-15 13:56:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:56:06,921 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:06,921 INFO L225 Difference]: With dead ends: 163 [2020-09-15 13:56:06,921 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 13:56:06,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1311, Invalid=3519, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:56:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 13:56:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 99. [2020-09-15 13:56:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 13:56:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 246 transitions. [2020-09-15 13:56:06,924 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 246 transitions. Word has length 38 [2020-09-15 13:56:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:06,924 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 246 transitions. [2020-09-15 13:56:06,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 246 transitions. [2020-09-15 13:56:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:06,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:06,925 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:07,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 13:56:07,127 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -220472455, now seen corresponding path program 227 times [2020-09-15 13:56:07,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:07,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614878145] [2020-09-15 13:56:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:08,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614878145] [2020-09-15 13:56:08,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113490574] [2020-09-15 13:56:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:08,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-15 13:56:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:08,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:08,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:08,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879520538] [2020-09-15 13:56:08,315 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:08,318 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:08,328 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:08,329 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:08,331 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:08,331 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:08,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:08,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:08,427 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104376#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:56:08,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:08,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:08,428 INFO L87 Difference]: Start difference. First operand 99 states and 246 transitions. Second operand 35 states. [2020-09-15 13:56:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:10,718 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-15 13:56:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:56:10,720 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:10,721 INFO L225 Difference]: With dead ends: 161 [2020-09-15 13:56:10,721 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 13:56:10,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:56:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 13:56:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2020-09-15 13:56:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 13:56:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 252 transitions. [2020-09-15 13:56:10,724 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 252 transitions. Word has length 38 [2020-09-15 13:56:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:10,724 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 252 transitions. [2020-09-15 13:56:10,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 252 transitions. [2020-09-15 13:56:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:10,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:10,724 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:10,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-15 13:56:10,925 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash 830511323, now seen corresponding path program 228 times [2020-09-15 13:56:10,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:10,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396075835] [2020-09-15 13:56:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:11,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396075835] [2020-09-15 13:56:11,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101941370] [2020-09-15 13:56:11,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:12,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:56:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:12,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:12,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:12,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183924711] [2020-09-15 13:56:12,104 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:12,107 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:12,117 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:12,117 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:12,119 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:12,119 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:12,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:12,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:12,222 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [104959#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:56:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:12,223 INFO L87 Difference]: Start difference. First operand 101 states and 252 transitions. Second operand 35 states. [2020-09-15 13:56:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:14,756 INFO L93 Difference]: Finished difference Result 159 states and 370 transitions. [2020-09-15 13:56:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:56:14,757 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:14,758 INFO L225 Difference]: With dead ends: 159 [2020-09-15 13:56:14,758 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 13:56:14,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1367, Invalid=4035, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:56:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 13:56:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 103. [2020-09-15 13:56:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 13:56:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 258 transitions. [2020-09-15 13:56:14,762 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 258 transitions. Word has length 38 [2020-09-15 13:56:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:14,762 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 258 transitions. [2020-09-15 13:56:14,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 258 transitions. [2020-09-15 13:56:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:14,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:14,762 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:14,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:56:14,963 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1818671427, now seen corresponding path program 229 times [2020-09-15 13:56:14,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:14,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104853034] [2020-09-15 13:56:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:15,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104853034] [2020-09-15 13:56:15,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311863927] [2020-09-15 13:56:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:16,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:16,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:16,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193635239] [2020-09-15 13:56:16,076 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:16,078 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:16,088 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:16,088 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:16,091 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:16,091 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:16,170 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:16,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:16,186 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [105548#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:56:16,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:16,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:16,187 INFO L87 Difference]: Start difference. First operand 103 states and 258 transitions. Second operand 35 states. [2020-09-15 13:56:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:18,863 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-15 13:56:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:56:18,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:18,865 INFO L225 Difference]: With dead ends: 157 [2020-09-15 13:56:18,865 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 13:56:18,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1419, Invalid=4281, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 13:56:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 13:56:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2020-09-15 13:56:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 13:56:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 264 transitions. [2020-09-15 13:56:18,868 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 264 transitions. Word has length 38 [2020-09-15 13:56:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:18,868 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 264 transitions. [2020-09-15 13:56:18,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 264 transitions. [2020-09-15 13:56:18,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:18,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:18,869 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:19,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:56:19,070 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1852310815, now seen corresponding path program 230 times [2020-09-15 13:56:19,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:19,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398652980] [2020-09-15 13:56:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:20,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398652980] [2020-09-15 13:56:20,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036795306] [2020-09-15 13:56:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:20,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:56:20,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:20,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:20,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:20,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:20,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1792117112] [2020-09-15 13:56:20,167 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:20,169 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:20,179 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:20,179 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:20,180 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:20,180 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:20,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:20,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:20,286 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106143#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:56:20,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:20,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:20,287 INFO L87 Difference]: Start difference. First operand 105 states and 264 transitions. Second operand 35 states. [2020-09-15 13:56:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:23,168 INFO L93 Difference]: Finished difference Result 155 states and 366 transitions. [2020-09-15 13:56:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:56:23,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:23,170 INFO L225 Difference]: With dead ends: 155 [2020-09-15 13:56:23,170 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 13:56:23,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1487, Invalid=4519, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:56:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 13:56:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 107. [2020-09-15 13:56:23,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 13:56:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 270 transitions. [2020-09-15 13:56:23,173 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 270 transitions. Word has length 38 [2020-09-15 13:56:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:23,173 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 270 transitions. [2020-09-15 13:56:23,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 270 transitions. [2020-09-15 13:56:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:23,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:23,174 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:23,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:56:23,377 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1053363199, now seen corresponding path program 231 times [2020-09-15 13:56:23,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:23,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100910121] [2020-09-15 13:56:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:24,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100910121] [2020-09-15 13:56:24,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23850297] [2020-09-15 13:56:24,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:24,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:56:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:24,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:24,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:24,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [883782258] [2020-09-15 13:56:24,509 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:24,511 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:24,521 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:24,521 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:24,524 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:24,524 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:24,606 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:24,606 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:24,623 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106744#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:56:24,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:24,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:24,624 INFO L87 Difference]: Start difference. First operand 107 states and 270 transitions. Second operand 35 states. [2020-09-15 13:56:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:27,737 INFO L93 Difference]: Finished difference Result 153 states and 364 transitions. [2020-09-15 13:56:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:56:27,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:27,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:27,740 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:56:27,740 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:56:27,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 13:56:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:56:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2020-09-15 13:56:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 13:56:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 276 transitions. [2020-09-15 13:56:27,743 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 276 transitions. Word has length 38 [2020-09-15 13:56:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:27,743 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 276 transitions. [2020-09-15 13:56:27,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 276 transitions. [2020-09-15 13:56:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:27,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:27,744 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:27,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 13:56:27,945 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash 391656291, now seen corresponding path program 232 times [2020-09-15 13:56:27,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:27,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893040944] [2020-09-15 13:56:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:28,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893040944] [2020-09-15 13:56:28,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549888529] [2020-09-15 13:56:28,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:28,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:56:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:29,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:29,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:29,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [121811001] [2020-09-15 13:56:29,017 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:29,019 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:29,029 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:29,030 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:29,032 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:29,032 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:29,111 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:29,112 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:29,130 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107351#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:56:29,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:29,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:29,131 INFO L87 Difference]: Start difference. First operand 109 states and 276 transitions. Second operand 35 states. [2020-09-15 13:56:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:32,449 INFO L93 Difference]: Finished difference Result 151 states and 362 transitions. [2020-09-15 13:56:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:56:32,451 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:32,452 INFO L225 Difference]: With dead ends: 151 [2020-09-15 13:56:32,452 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 13:56:32,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1671, Invalid=4971, Unknown=0, NotChecked=0, Total=6642 [2020-09-15 13:56:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 13:56:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2020-09-15 13:56:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 13:56:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 282 transitions. [2020-09-15 13:56:32,456 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 282 transitions. Word has length 38 [2020-09-15 13:56:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:32,456 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 282 transitions. [2020-09-15 13:56:32,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 282 transitions. [2020-09-15 13:56:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:32,457 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:32,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-15 13:56:32,664 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -366615739, now seen corresponding path program 233 times [2020-09-15 13:56:32,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:32,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905524348] [2020-09-15 13:56:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:33,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905524348] [2020-09-15 13:56:33,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975662994] [2020-09-15 13:56:33,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:33,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-15 13:56:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:33,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:33,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:33,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:33,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2003311912] [2020-09-15 13:56:33,777 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:33,780 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:33,792 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:33,792 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:33,794 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:33,794 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:33,880 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:33,880 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:33,899 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [107964#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:56:33,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:33,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:33,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:33,900 INFO L87 Difference]: Start difference. First operand 111 states and 282 transitions. Second operand 35 states. [2020-09-15 13:56:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:37,455 INFO L93 Difference]: Finished difference Result 149 states and 360 transitions. [2020-09-15 13:56:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:56:37,457 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:37,457 INFO L225 Difference]: With dead ends: 149 [2020-09-15 13:56:37,457 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 13:56:37,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1787, Invalid=5185, Unknown=0, NotChecked=0, Total=6972 [2020-09-15 13:56:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 13:56:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-09-15 13:56:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-15 13:56:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2020-09-15 13:56:37,460 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 38 [2020-09-15 13:56:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:37,460 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2020-09-15 13:56:37,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2020-09-15 13:56:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:37,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:37,460 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:37,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 13:56:37,661 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2097011801, now seen corresponding path program 234 times [2020-09-15 13:56:37,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:37,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170388700] [2020-09-15 13:56:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170388700] [2020-09-15 13:56:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347440396] [2020-09-15 13:56:38,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:38,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:56:38,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:38,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:38,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:38,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101809010] [2020-09-15 13:56:38,780 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:38,783 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:38,794 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:38,794 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:38,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:38,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:38,878 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:38,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:38,898 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [108583#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:56:38,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:38,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:38,899 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand 35 states. [2020-09-15 13:56:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:42,563 INFO L93 Difference]: Finished difference Result 147 states and 358 transitions. [2020-09-15 13:56:42,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:56:42,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:42,566 INFO L225 Difference]: With dead ends: 147 [2020-09-15 13:56:42,566 INFO L226 Difference]: Without dead ends: 141 [2020-09-15 13:56:42,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1919, Invalid=5391, Unknown=0, NotChecked=0, Total=7310 [2020-09-15 13:56:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-15 13:56:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2020-09-15 13:56:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-15 13:56:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 294 transitions. [2020-09-15 13:56:42,570 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 294 transitions. Word has length 38 [2020-09-15 13:56:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:42,570 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 294 transitions. [2020-09-15 13:56:42,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 294 transitions. [2020-09-15 13:56:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:42,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:42,571 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:42,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 13:56:42,771 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1565987977, now seen corresponding path program 235 times [2020-09-15 13:56:42,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:42,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569362611] [2020-09-15 13:56:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:43,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569362611] [2020-09-15 13:56:43,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681956958] [2020-09-15 13:56:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:43,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:43,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:43,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [480142745] [2020-09-15 13:56:43,871 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:43,874 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:43,885 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:43,885 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:43,887 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:43,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:43,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:43,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:43,997 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109208#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:56:43,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:43,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:43,998 INFO L87 Difference]: Start difference. First operand 115 states and 294 transitions. Second operand 35 states. [2020-09-15 13:56:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:47,892 INFO L93 Difference]: Finished difference Result 145 states and 356 transitions. [2020-09-15 13:56:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:56:47,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:47,895 INFO L225 Difference]: With dead ends: 145 [2020-09-15 13:56:47,895 INFO L226 Difference]: Without dead ends: 139 [2020-09-15 13:56:47,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2067, Invalid=5589, Unknown=0, NotChecked=0, Total=7656 [2020-09-15 13:56:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-15 13:56:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2020-09-15 13:56:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-15 13:56:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 300 transitions. [2020-09-15 13:56:47,898 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 300 transitions. Word has length 38 [2020-09-15 13:56:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:47,899 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 300 transitions. [2020-09-15 13:56:47,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 300 transitions. [2020-09-15 13:56:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:47,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:47,899 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:48,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 13:56:48,109 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash 144102891, now seen corresponding path program 236 times [2020-09-15 13:56:48,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:48,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158275743] [2020-09-15 13:56:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:49,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158275743] [2020-09-15 13:56:49,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006806772] [2020-09-15 13:56:49,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:49,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:56:49,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:49,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:49,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:49,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:49,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:49,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1283258737] [2020-09-15 13:56:49,243 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:49,246 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:49,280 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:49,280 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:49,282 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:49,282 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:49,363 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:49,364 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:49,382 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [109839#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:56:49,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:49,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:49,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:49,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:49,383 INFO L87 Difference]: Start difference. First operand 117 states and 300 transitions. Second operand 35 states. [2020-09-15 13:56:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:53,436 INFO L93 Difference]: Finished difference Result 143 states and 354 transitions. [2020-09-15 13:56:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:56:53,439 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:53,439 INFO L225 Difference]: With dead ends: 143 [2020-09-15 13:56:53,439 INFO L226 Difference]: Without dead ends: 137 [2020-09-15 13:56:53,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2231, Invalid=5779, Unknown=0, NotChecked=0, Total=8010 [2020-09-15 13:56:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-15 13:56:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2020-09-15 13:56:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 13:56:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 306 transitions. [2020-09-15 13:56:53,442 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 306 transitions. Word has length 38 [2020-09-15 13:56:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:53,443 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 306 transitions. [2020-09-15 13:56:53,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:53,443 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 306 transitions. [2020-09-15 13:56:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:53,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:53,443 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:53,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:56:53,644 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1975810099, now seen corresponding path program 237 times [2020-09-15 13:56:53,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:53,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071600010] [2020-09-15 13:56:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:56:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:54,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071600010] [2020-09-15 13:56:54,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613580061] [2020-09-15 13:56:54,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:56:54,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-15 13:56:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:56:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:56:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:56:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:56:54,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:56:54,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:56:54,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [451078178] [2020-09-15 13:56:54,791 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:56:54,793 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:56:54,806 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:56:54,806 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:56:54,809 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:54,809 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:54,896 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:56:54,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:56:54,917 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [110476#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:56:54,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:56:54,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:56:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:56:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:56:54,918 INFO L87 Difference]: Start difference. First operand 119 states and 306 transitions. Second operand 35 states. [2020-09-15 13:56:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:56:59,242 INFO L93 Difference]: Finished difference Result 141 states and 352 transitions. [2020-09-15 13:56:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 13:56:59,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:56:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:56:59,244 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:56:59,245 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 13:56:59,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2411, Invalid=5961, Unknown=0, NotChecked=0, Total=8372 [2020-09-15 13:56:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 13:56:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2020-09-15 13:56:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 13:56:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 312 transitions. [2020-09-15 13:56:59,248 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 312 transitions. Word has length 38 [2020-09-15 13:56:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:56:59,248 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 312 transitions. [2020-09-15 13:56:59,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:56:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 312 transitions. [2020-09-15 13:56:59,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:56:59,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:56:59,249 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:56:59,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 13:56:59,450 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:56:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:56:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1070025263, now seen corresponding path program 238 times [2020-09-15 13:56:59,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:56:59,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533060769] [2020-09-15 13:56:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:56:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:00,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533060769] [2020-09-15 13:57:00,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549338685] [2020-09-15 13:57:00,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:00,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:57:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:57:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:00,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:00,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:57:00,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [480959825] [2020-09-15 13:57:00,561 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:00,563 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:00,575 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:57:00,575 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:00,577 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:00,577 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:00,662 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:00,663 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:00,682 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111119#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-15 13:57:00,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:57:00,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:57:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:57:00,684 INFO L87 Difference]: Start difference. First operand 121 states and 312 transitions. Second operand 35 states. [2020-09-15 13:57:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:05,180 INFO L93 Difference]: Finished difference Result 141 states and 355 transitions. [2020-09-15 13:57:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-15 13:57:05,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:57:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:05,183 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:57:05,183 INFO L226 Difference]: Without dead ends: 135 [2020-09-15 13:57:05,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2607, Invalid=6135, Unknown=0, NotChecked=0, Total=8742 [2020-09-15 13:57:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-15 13:57:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2020-09-15 13:57:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-15 13:57:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 320 transitions. [2020-09-15 13:57:05,185 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 320 transitions. Word has length 38 [2020-09-15 13:57:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:05,185 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 320 transitions. [2020-09-15 13:57:05,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:57:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 320 transitions. [2020-09-15 13:57:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:57:05,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:05,186 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:05,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:05,387 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1086602513, now seen corresponding path program 239 times [2020-09-15 13:57:05,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:05,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584300568] [2020-09-15 13:57:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:06,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584300568] [2020-09-15 13:57:06,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404057612] [2020-09-15 13:57:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:06,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-09-15 13:57:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2020-09-15 13:57:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:06,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:06,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-09-15 13:57:06,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436631307] [2020-09-15 13:57:06,561 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:06,563 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:06,574 INFO L274 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-09-15 13:57:06,574 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:06,575 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:06,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:06,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:06,661 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:06,724 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [111770#(and (<= ~i~0 46) (<= ~j~0 36))] [2020-09-15 13:57:06,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-15 13:57:06,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-15 13:57:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:57:06,725 INFO L87 Difference]: Start difference. First operand 123 states and 320 transitions. Second operand 35 states. [2020-09-15 13:57:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:11,398 INFO L93 Difference]: Finished difference Result 141 states and 363 transitions. [2020-09-15 13:57:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-15 13:57:11,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-09-15 13:57:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:11,400 INFO L225 Difference]: With dead ends: 141 [2020-09-15 13:57:11,400 INFO L226 Difference]: Without dead ends: 129 [2020-09-15 13:57:11,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2817, Invalid=6303, Unknown=0, NotChecked=0, Total=9120 [2020-09-15 13:57:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-15 13:57:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2020-09-15 13:57:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-15 13:57:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2020-09-15 13:57:11,403 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 38 [2020-09-15 13:57:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:11,404 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2020-09-15 13:57:11,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-15 13:57:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2020-09-15 13:57:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:11,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:11,404 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:11,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:11,605 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash 315932105, now seen corresponding path program 240 times [2020-09-15 13:57:11,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:11,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902165527] [2020-09-15 13:57:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:12,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902165527] [2020-09-15 13:57:12,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437852358] [2020-09-15 13:57:12,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:12,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-15 13:57:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:12,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:13,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:13,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:13,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [561095102] [2020-09-15 13:57:13,019 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:13,022 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:13,034 INFO L274 McrAutomatonBuilder]: Finished intersection with 49 states and 59 transitions. [2020-09-15 13:57:13,034 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:13,035 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,035 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,116 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,205 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,206 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,212 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,212 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,230 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,230 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,240 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,240 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,302 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,303 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,312 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:13,312 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:13,328 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112363#(and (<= ~j~0 4) (<= ~i~0 46))] [2020-09-15 13:57:13,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:13,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:13,330 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand 36 states. [2020-09-15 13:57:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:15,741 INFO L93 Difference]: Finished difference Result 138 states and 322 transitions. [2020-09-15 13:57:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:57:15,743 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:15,743 INFO L225 Difference]: With dead ends: 138 [2020-09-15 13:57:15,743 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 13:57:15,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1393, Invalid=3299, Unknown=0, NotChecked=0, Total=4692 [2020-09-15 13:57:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 13:57:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2020-09-15 13:57:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 13:57:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2020-09-15 13:57:15,746 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 39 [2020-09-15 13:57:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:15,746 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2020-09-15 13:57:15,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2020-09-15 13:57:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:15,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:15,747 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:15,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:15,948 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash 5925291, now seen corresponding path program 241 times [2020-09-15 13:57:15,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:15,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392575146] [2020-09-15 13:57:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:17,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392575146] [2020-09-15 13:57:17,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675503558] [2020-09-15 13:57:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:17,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:17,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:17,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123137847] [2020-09-15 13:57:17,421 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:17,424 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:17,435 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:17,435 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:17,435 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:17,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:17,528 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:17,529 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:17,547 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [112913#(and (<= ~j~0 6) (<= ~i~0 46))] [2020-09-15 13:57:17,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:17,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:17,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:17,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:17,548 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand 36 states. [2020-09-15 13:57:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:20,145 INFO L93 Difference]: Finished difference Result 202 states and 452 transitions. [2020-09-15 13:57:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:57:20,147 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:20,148 INFO L225 Difference]: With dead ends: 202 [2020-09-15 13:57:20,148 INFO L226 Difference]: Without dead ends: 196 [2020-09-15 13:57:20,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1464, Invalid=3792, Unknown=0, NotChecked=0, Total=5256 [2020-09-15 13:57:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-15 13:57:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 100. [2020-09-15 13:57:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 13:57:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 248 transitions. [2020-09-15 13:57:20,152 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 248 transitions. Word has length 39 [2020-09-15 13:57:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:20,153 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 248 transitions. [2020-09-15 13:57:20,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 248 transitions. [2020-09-15 13:57:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:20,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:20,153 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:20,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:20,363 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:20,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:20,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1178753523, now seen corresponding path program 242 times [2020-09-15 13:57:20,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:20,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578182119] [2020-09-15 13:57:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:21,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578182119] [2020-09-15 13:57:21,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652633805] [2020-09-15 13:57:21,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:21,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:57:21,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:21,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:21,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:21,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:21,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1132109010] [2020-09-15 13:57:21,799 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:21,801 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:21,813 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:21,813 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:21,817 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:21,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:21,913 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:21,913 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:21,930 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [113539#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:57:21,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:21,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:21,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:21,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:21,931 INFO L87 Difference]: Start difference. First operand 100 states and 248 transitions. Second operand 36 states. [2020-09-15 13:57:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:24,596 INFO L93 Difference]: Finished difference Result 199 states and 448 transitions. [2020-09-15 13:57:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:57:24,598 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:24,598 INFO L225 Difference]: With dead ends: 199 [2020-09-15 13:57:24,599 INFO L226 Difference]: Without dead ends: 193 [2020-09-15 13:57:24,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1481, Invalid=4069, Unknown=0, NotChecked=0, Total=5550 [2020-09-15 13:57:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-15 13:57:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 102. [2020-09-15 13:57:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 13:57:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 254 transitions. [2020-09-15 13:57:24,601 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 254 transitions. Word has length 39 [2020-09-15 13:57:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:24,602 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 254 transitions. [2020-09-15 13:57:24,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 254 transitions. [2020-09-15 13:57:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:24,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:24,602 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:24,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-15 13:57:24,803 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash -500657425, now seen corresponding path program 243 times [2020-09-15 13:57:24,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:24,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767710990] [2020-09-15 13:57:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:26,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767710990] [2020-09-15 13:57:26,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331663614] [2020-09-15 13:57:26,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:26,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-15 13:57:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:26,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:26,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:26,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:26,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2127529674] [2020-09-15 13:57:26,154 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:26,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:26,168 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:26,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:26,172 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:26,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:26,262 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:26,263 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:26,280 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114170#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:57:26,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:26,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:26,281 INFO L87 Difference]: Start difference. First operand 102 states and 254 transitions. Second operand 36 states. [2020-09-15 13:57:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:29,123 INFO L93 Difference]: Finished difference Result 197 states and 446 transitions. [2020-09-15 13:57:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:57:29,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:29,126 INFO L225 Difference]: With dead ends: 197 [2020-09-15 13:57:29,126 INFO L226 Difference]: Without dead ends: 191 [2020-09-15 13:57:29,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1514, Invalid=4338, Unknown=0, NotChecked=0, Total=5852 [2020-09-15 13:57:29,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-15 13:57:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2020-09-15 13:57:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 13:57:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2020-09-15 13:57:29,128 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 39 [2020-09-15 13:57:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:29,129 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2020-09-15 13:57:29,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2020-09-15 13:57:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:29,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:29,129 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:29,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-15 13:57:29,330 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 550326353, now seen corresponding path program 244 times [2020-09-15 13:57:29,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:29,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123457801] [2020-09-15 13:57:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:30,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123457801] [2020-09-15 13:57:30,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235278309] [2020-09-15 13:57:30,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:30,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:57:30,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:30,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:30,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:30,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1674954053] [2020-09-15 13:57:30,703 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:30,705 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:30,717 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:30,717 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:30,721 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:30,721 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:30,816 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:30,817 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:30,836 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [114807#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:57:30,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:30,837 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand 36 states. [2020-09-15 13:57:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:33,902 INFO L93 Difference]: Finished difference Result 195 states and 444 transitions. [2020-09-15 13:57:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:57:33,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:33,905 INFO L225 Difference]: With dead ends: 195 [2020-09-15 13:57:33,906 INFO L226 Difference]: Without dead ends: 189 [2020-09-15 13:57:33,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1563, Invalid=4599, Unknown=0, NotChecked=0, Total=6162 [2020-09-15 13:57:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-15 13:57:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2020-09-15 13:57:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-15 13:57:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 266 transitions. [2020-09-15 13:57:33,908 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 266 transitions. Word has length 39 [2020-09-15 13:57:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:33,908 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 266 transitions. [2020-09-15 13:57:33,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 266 transitions. [2020-09-15 13:57:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:33,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:33,909 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:34,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-15 13:57:34,110 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:34,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:34,111 INFO L82 PathProgramCache]: Analyzing trace with hash -2098856397, now seen corresponding path program 245 times [2020-09-15 13:57:34,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:34,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998394326] [2020-09-15 13:57:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:35,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998394326] [2020-09-15 13:57:35,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203751137] [2020-09-15 13:57:35,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:35,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-15 13:57:35,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:35,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:35,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:35,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [953312210] [2020-09-15 13:57:35,434 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:35,437 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:35,447 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:35,448 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:35,451 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:35,451 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:35,539 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:35,540 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:35,556 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [115450#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:57:35,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:35,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:35,557 INFO L87 Difference]: Start difference. First operand 106 states and 266 transitions. Second operand 36 states. [2020-09-15 13:57:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:38,783 INFO L93 Difference]: Finished difference Result 193 states and 442 transitions. [2020-09-15 13:57:38,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:57:38,785 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:38,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:38,785 INFO L225 Difference]: With dead ends: 193 [2020-09-15 13:57:38,785 INFO L226 Difference]: Without dead ends: 187 [2020-09-15 13:57:38,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1628, Invalid=4852, Unknown=0, NotChecked=0, Total=6480 [2020-09-15 13:57:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-15 13:57:38,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 108. [2020-09-15 13:57:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-15 13:57:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 272 transitions. [2020-09-15 13:57:38,789 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 272 transitions. Word has length 39 [2020-09-15 13:57:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:38,789 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 272 transitions. [2020-09-15 13:57:38,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 272 transitions. [2020-09-15 13:57:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:38,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:38,790 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:38,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-15 13:57:38,993 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1572125845, now seen corresponding path program 246 times [2020-09-15 13:57:38,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:38,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290530008] [2020-09-15 13:57:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:40,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290530008] [2020-09-15 13:57:40,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645093315] [2020-09-15 13:57:40,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:40,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-15 13:57:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:40,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:40,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:40,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [33510237] [2020-09-15 13:57:40,316 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:40,319 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:40,330 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:40,330 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:40,334 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:40,334 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:40,426 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:40,426 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:40,443 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116099#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:57:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:40,444 INFO L87 Difference]: Start difference. First operand 108 states and 272 transitions. Second operand 36 states. [2020-09-15 13:57:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:44,069 INFO L93 Difference]: Finished difference Result 191 states and 440 transitions. [2020-09-15 13:57:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:57:44,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:44,072 INFO L225 Difference]: With dead ends: 191 [2020-09-15 13:57:44,072 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 13:57:44,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1709, Invalid=5097, Unknown=0, NotChecked=0, Total=6806 [2020-09-15 13:57:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 13:57:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2020-09-15 13:57:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 13:57:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 278 transitions. [2020-09-15 13:57:44,075 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 278 transitions. Word has length 39 [2020-09-15 13:57:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:44,075 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 278 transitions. [2020-09-15 13:57:44,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 278 transitions. [2020-09-15 13:57:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:44,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:44,076 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:44,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:44,277 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1333548169, now seen corresponding path program 247 times [2020-09-15 13:57:44,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:44,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080914143] [2020-09-15 13:57:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:45,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080914143] [2020-09-15 13:57:45,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822723747] [2020-09-15 13:57:45,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:45,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:45,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:45,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [37577631] [2020-09-15 13:57:45,546 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:45,549 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:45,560 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:45,560 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:45,564 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:45,564 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:45,658 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:45,658 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:45,676 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [116754#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:57:45,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:45,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:45,678 INFO L87 Difference]: Start difference. First operand 110 states and 278 transitions. Second operand 36 states. [2020-09-15 13:57:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:49,388 INFO L93 Difference]: Finished difference Result 189 states and 438 transitions. [2020-09-15 13:57:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:57:49,390 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:49,390 INFO L225 Difference]: With dead ends: 189 [2020-09-15 13:57:49,391 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 13:57:49,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1806, Invalid=5334, Unknown=0, NotChecked=0, Total=7140 [2020-09-15 13:57:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 13:57:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 112. [2020-09-15 13:57:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 13:57:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-09-15 13:57:49,394 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 39 [2020-09-15 13:57:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:49,394 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-09-15 13:57:49,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-09-15 13:57:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:49,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:49,395 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:49,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-15 13:57:49,604 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:49,604 INFO L82 PathProgramCache]: Analyzing trace with hash 111471321, now seen corresponding path program 248 times [2020-09-15 13:57:49,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:49,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65541623] [2020-09-15 13:57:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:50,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65541623] [2020-09-15 13:57:50,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902094489] [2020-09-15 13:57:50,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:50,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:57:50,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:50,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:50,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:50,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2044220922] [2020-09-15 13:57:50,855 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:50,858 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:50,869 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:50,869 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:50,872 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:50,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:50,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:50,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:50,981 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [117415#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:57:50,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:50,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:50,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:50,981 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 36 states. [2020-09-15 13:57:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:57:54,931 INFO L93 Difference]: Finished difference Result 187 states and 436 transitions. [2020-09-15 13:57:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:57:54,934 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:57:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:57:54,934 INFO L225 Difference]: With dead ends: 187 [2020-09-15 13:57:54,934 INFO L226 Difference]: Without dead ends: 181 [2020-09-15 13:57:54,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1919, Invalid=5563, Unknown=0, NotChecked=0, Total=7482 [2020-09-15 13:57:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-15 13:57:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 114. [2020-09-15 13:57:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 13:57:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 290 transitions. [2020-09-15 13:57:54,937 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 290 transitions. Word has length 39 [2020-09-15 13:57:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:57:54,937 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 290 transitions. [2020-09-15 13:57:54,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:57:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 290 transitions. [2020-09-15 13:57:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:57:54,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:57:54,938 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:57:55,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:57:55,139 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:57:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:57:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash -646800709, now seen corresponding path program 249 times [2020-09-15 13:57:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:57:55,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180535274] [2020-09-15 13:57:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:57:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:57:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:56,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180535274] [2020-09-15 13:57:56,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168104955] [2020-09-15 13:57:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:57:56,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-15 13:57:56,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:57:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:57:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:57:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:57:56,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:57:56,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:57:56,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [315771610] [2020-09-15 13:57:56,438 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:57:56,441 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:57:56,452 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:57:56,452 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:57:56,456 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:56,456 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:56,546 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:57:56,546 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:57:56,563 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118082#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:57:56,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:57:56,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:57:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:57:56,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:57:56,565 INFO L87 Difference]: Start difference. First operand 114 states and 290 transitions. Second operand 36 states. [2020-09-15 13:58:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:00,693 INFO L93 Difference]: Finished difference Result 185 states and 434 transitions. [2020-09-15 13:58:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:58:00,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:00,695 INFO L225 Difference]: With dead ends: 185 [2020-09-15 13:58:00,696 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 13:58:00,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2048, Invalid=5784, Unknown=0, NotChecked=0, Total=7832 [2020-09-15 13:58:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 13:58:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 116. [2020-09-15 13:58:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-15 13:58:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 296 transitions. [2020-09-15 13:58:00,698 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 296 transitions. Word has length 39 [2020-09-15 13:58:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:00,698 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 296 transitions. [2020-09-15 13:58:00,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 296 transitions. [2020-09-15 13:58:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:00,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:00,699 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:00,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:00,899 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1917770525, now seen corresponding path program 250 times [2020-09-15 13:58:00,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:00,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103886511] [2020-09-15 13:58:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:02,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103886511] [2020-09-15 13:58:02,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757513230] [2020-09-15 13:58:02,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:58:02,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:58:02,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:02,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:58:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:02,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:02,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:02,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500117974] [2020-09-15 13:58:02,148 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:02,150 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:02,162 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:02,162 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:02,166 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:02,166 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:02,257 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:02,257 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:02,274 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [118755#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:58:02,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:02,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:02,276 INFO L87 Difference]: Start difference. First operand 116 states and 296 transitions. Second operand 36 states. [2020-09-15 13:58:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:06,582 INFO L93 Difference]: Finished difference Result 183 states and 432 transitions. [2020-09-15 13:58:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:58:06,585 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:06,585 INFO L225 Difference]: With dead ends: 183 [2020-09-15 13:58:06,586 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 13:58:06,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2193, Invalid=5997, Unknown=0, NotChecked=0, Total=8190 [2020-09-15 13:58:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 13:58:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 118. [2020-09-15 13:58:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 13:58:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 302 transitions. [2020-09-15 13:58:06,588 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 302 transitions. Word has length 39 [2020-09-15 13:58:06,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:06,588 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 302 transitions. [2020-09-15 13:58:06,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 302 transitions. [2020-09-15 13:58:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:06,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:06,589 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:06,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:06,791 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1285803007, now seen corresponding path program 251 times [2020-09-15 13:58:06,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:06,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288055699] [2020-09-15 13:58:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:07,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288055699] [2020-09-15 13:58:07,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888997460] [2020-09-15 13:58:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:58:08,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-15 13:58:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:58:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:08,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:08,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:08,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1255764926] [2020-09-15 13:58:08,107 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:08,110 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:08,121 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:08,122 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:08,125 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:08,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:08,218 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:08,219 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:08,235 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [119434#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:58:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:08,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:08,236 INFO L87 Difference]: Start difference. First operand 118 states and 302 transitions. Second operand 36 states. [2020-09-15 13:58:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:12,748 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-15 13:58:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 13:58:12,750 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:12,751 INFO L225 Difference]: With dead ends: 181 [2020-09-15 13:58:12,751 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 13:58:12,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2354, Invalid=6202, Unknown=0, NotChecked=0, Total=8556 [2020-09-15 13:58:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 13:58:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-15 13:58:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 13:58:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 308 transitions. [2020-09-15 13:58:12,755 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 308 transitions. Word has length 39 [2020-09-15 13:58:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:12,755 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 308 transitions. [2020-09-15 13:58:12,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 308 transitions. [2020-09-15 13:58:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:12,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:12,756 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:12,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:12,964 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -136082079, now seen corresponding path program 252 times [2020-09-15 13:58:12,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:12,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357251707] [2020-09-15 13:58:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:14,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357251707] [2020-09-15 13:58:14,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356946790] [2020-09-15 13:58:14,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-15 13:58:14,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-15 13:58:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2020-09-15 13:58:14,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:14,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:14,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:14,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1718812578] [2020-09-15 13:58:14,251 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:14,254 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:14,265 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:14,265 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:14,269 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:14,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:14,359 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:14,359 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:14,377 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [120119#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:58:14,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:14,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:14,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:14,378 INFO L87 Difference]: Start difference. First operand 120 states and 308 transitions. Second operand 36 states. [2020-09-15 13:58:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:19,125 INFO L93 Difference]: Finished difference Result 179 states and 428 transitions. [2020-09-15 13:58:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-15 13:58:19,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:19,128 INFO L225 Difference]: With dead ends: 179 [2020-09-15 13:58:19,128 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 13:58:19,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2531, Invalid=6399, Unknown=0, NotChecked=0, Total=8930 [2020-09-15 13:58:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 13:58:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2020-09-15 13:58:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 13:58:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 314 transitions. [2020-09-15 13:58:19,131 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 314 transitions. Word has length 39 [2020-09-15 13:58:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:19,132 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 314 transitions. [2020-09-15 13:58:19,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 314 transitions. [2020-09-15 13:58:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:19,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:19,132 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:19,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2020-09-15 13:58:19,337 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2038972227, now seen corresponding path program 253 times [2020-09-15 13:58:19,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:19,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655641127] [2020-09-15 13:58:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:20,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655641127] [2020-09-15 13:58:20,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039328002] [2020-09-15 13:58:20,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:58:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:20,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:20,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:20,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [151568853] [2020-09-15 13:58:20,630 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:20,632 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:20,643 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:20,644 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:20,647 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:20,647 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:20,738 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:20,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:20,755 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [120810#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:58:20,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:20,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:20,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:20,756 INFO L87 Difference]: Start difference. First operand 122 states and 314 transitions. Second operand 36 states. [2020-09-15 13:58:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:25,594 INFO L93 Difference]: Finished difference Result 177 states and 426 transitions. [2020-09-15 13:58:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-15 13:58:25,596 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:25,597 INFO L225 Difference]: With dead ends: 177 [2020-09-15 13:58:25,597 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 13:58:25,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2724, Invalid=6588, Unknown=0, NotChecked=0, Total=9312 [2020-09-15 13:58:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 13:58:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-15 13:58:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 13:58:25,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 320 transitions. [2020-09-15 13:58:25,600 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 320 transitions. Word has length 39 [2020-09-15 13:58:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:25,600 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 320 transitions. [2020-09-15 13:58:25,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 320 transitions. [2020-09-15 13:58:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:25,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:25,601 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:25,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-15 13:58:25,809 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 789840293, now seen corresponding path program 254 times [2020-09-15 13:58:25,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:25,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749756631] [2020-09-15 13:58:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:26,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749756631] [2020-09-15 13:58:26,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978539791] [2020-09-15 13:58:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:27,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:58:27,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:58:27,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:27,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:27,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:27,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739175462] [2020-09-15 13:58:27,088 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:27,091 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:27,104 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:27,104 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:27,108 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:27,108 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:27,201 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:27,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:27,219 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [121507#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:58:27,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:27,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:27,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:27,220 INFO L87 Difference]: Start difference. First operand 124 states and 320 transitions. Second operand 36 states. [2020-09-15 13:58:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:32,382 INFO L93 Difference]: Finished difference Result 177 states and 429 transitions. [2020-09-15 13:58:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-15 13:58:32,385 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:32,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:32,385 INFO L225 Difference]: With dead ends: 177 [2020-09-15 13:58:32,386 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 13:58:32,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2933, Invalid=6769, Unknown=0, NotChecked=0, Total=9702 [2020-09-15 13:58:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 13:58:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2020-09-15 13:58:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-15 13:58:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 328 transitions. [2020-09-15 13:58:32,389 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 328 transitions. Word has length 39 [2020-09-15 13:58:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:32,389 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 328 transitions. [2020-09-15 13:58:32,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:32,390 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 328 transitions. [2020-09-15 13:58:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-15 13:58:32,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:32,390 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:32,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:32,594 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:32,595 INFO L82 PathProgramCache]: Analyzing trace with hash 806417543, now seen corresponding path program 255 times [2020-09-15 13:58:32,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:32,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876340500] [2020-09-15 13:58:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:33,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876340500] [2020-09-15 13:58:33,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839956644] [2020-09-15 13:58:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:33,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-15 13:58:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2020-09-15 13:58:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:33,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:33,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2020-09-15 13:58:33,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683928007] [2020-09-15 13:58:33,957 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:33,960 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:33,971 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-09-15 13:58:33,971 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:33,975 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:33,976 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:34,069 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:34,069 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:34,088 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [122212#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-15 13:58:34,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-15 13:58:34,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-15 13:58:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 13:58:34,089 INFO L87 Difference]: Start difference. First operand 126 states and 328 transitions. Second operand 36 states. [2020-09-15 13:58:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:39,394 INFO L93 Difference]: Finished difference Result 178 states and 439 transitions. [2020-09-15 13:58:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-09-15 13:58:39,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-09-15 13:58:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:39,397 INFO L225 Difference]: With dead ends: 178 [2020-09-15 13:58:39,397 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 13:58:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3156, Invalid=6944, Unknown=0, NotChecked=0, Total=10100 [2020-09-15 13:58:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 13:58:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 94. [2020-09-15 13:58:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 13:58:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 231 transitions. [2020-09-15 13:58:39,401 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 231 transitions. Word has length 39 [2020-09-15 13:58:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:39,401 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 231 transitions. [2020-09-15 13:58:39,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-15 13:58:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 231 transitions. [2020-09-15 13:58:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:58:39,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:39,402 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:39,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-15 13:58:39,603 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:39,603 INFO L82 PathProgramCache]: Analyzing trace with hash 74069812, now seen corresponding path program 256 times [2020-09-15 13:58:39,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:39,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571178938] [2020-09-15 13:58:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:41,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571178938] [2020-09-15 13:58:41,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456657796] [2020-09-15 13:58:41,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:41,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:58:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:58:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:41,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:41,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:58:41,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360180067] [2020-09-15 13:58:41,317 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:41,320 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:41,349 INFO L274 McrAutomatonBuilder]: Finished intersection with 49 states and 56 transitions. [2020-09-15 13:58:41,349 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:41,354 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:41,355 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:41,467 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:41,467 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:41,488 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [122862#(and (<= ~i~0 46) (<= ~j~0 8))] [2020-09-15 13:58:41,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:58:41,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:58:41,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:58:41,489 INFO L87 Difference]: Start difference. First operand 94 states and 231 transitions. Second operand 37 states. [2020-09-15 13:58:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:44,233 INFO L93 Difference]: Finished difference Result 174 states and 396 transitions. [2020-09-15 13:58:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 13:58:44,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:58:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:44,236 INFO L225 Difference]: With dead ends: 174 [2020-09-15 13:58:44,236 INFO L226 Difference]: Without dead ends: 168 [2020-09-15 13:58:44,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1472, Invalid=3640, Unknown=0, NotChecked=0, Total=5112 [2020-09-15 13:58:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-15 13:58:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 101. [2020-09-15 13:58:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 13:58:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 250 transitions. [2020-09-15 13:58:44,239 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 250 transitions. Word has length 40 [2020-09-15 13:58:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:44,239 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 250 transitions. [2020-09-15 13:58:44,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:58:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 250 transitions. [2020-09-15 13:58:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:58:44,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:44,240 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:44,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-15 13:58:44,441 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -235937002, now seen corresponding path program 257 times [2020-09-15 13:58:44,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:44,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032892211] [2020-09-15 13:58:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032892211] [2020-09-15 13:58:45,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307253576] [2020-09-15 13:58:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:46,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-15 13:58:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:58:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:46,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:46,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:58:46,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [414496533] [2020-09-15 13:58:46,094 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:46,098 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:46,110 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:58:46,110 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:46,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:46,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:46,216 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:46,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:46,239 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [123462#(and (<= ~j~0 10) (<= ~i~0 46))] [2020-09-15 13:58:46,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:58:46,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:58:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:58:46,240 INFO L87 Difference]: Start difference. First operand 101 states and 250 transitions. Second operand 37 states. [2020-09-15 13:58:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:49,129 INFO L93 Difference]: Finished difference Result 171 states and 392 transitions. [2020-09-15 13:58:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 13:58:49,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:58:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:49,132 INFO L225 Difference]: With dead ends: 171 [2020-09-15 13:58:49,132 INFO L226 Difference]: Without dead ends: 165 [2020-09-15 13:58:49,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1474, Invalid=3928, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:58:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-15 13:58:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 103. [2020-09-15 13:58:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 13:58:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 256 transitions. [2020-09-15 13:58:49,135 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 256 transitions. Word has length 40 [2020-09-15 13:58:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:49,135 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 256 transitions. [2020-09-15 13:58:49,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:58:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 256 transitions. [2020-09-15 13:58:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:58:49,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:49,136 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:49,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-15 13:58:49,338 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1420615816, now seen corresponding path program 258 times [2020-09-15 13:58:49,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:49,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480019110] [2020-09-15 13:58:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:50,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480019110] [2020-09-15 13:58:50,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742380565] [2020-09-15 13:58:50,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:50,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-15 13:58:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:58:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:58:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:50,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:50,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:58:50,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464675816] [2020-09-15 13:58:50,937 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:50,940 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:50,952 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:58:50,953 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:50,955 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:50,955 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:51,063 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:51,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:51,093 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [124067#(and (<= ~j~0 12) (<= ~i~0 46))] [2020-09-15 13:58:51,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:58:51,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:51,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:58:51,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:58:51,094 INFO L87 Difference]: Start difference. First operand 103 states and 256 transitions. Second operand 37 states. [2020-09-15 13:58:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:54,326 INFO L93 Difference]: Finished difference Result 169 states and 390 transitions. [2020-09-15 13:58:54,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:58:54,329 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:58:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:54,330 INFO L225 Difference]: With dead ends: 169 [2020-09-15 13:58:54,330 INFO L226 Difference]: Without dead ends: 163 [2020-09-15 13:58:54,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1492, Invalid=4208, Unknown=0, NotChecked=0, Total=5700 [2020-09-15 13:58:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-15 13:58:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 105. [2020-09-15 13:58:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 13:58:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 262 transitions. [2020-09-15 13:58:54,333 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 262 transitions. Word has length 40 [2020-09-15 13:58:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:54,333 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 262 transitions. [2020-09-15 13:58:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:58:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 262 transitions. [2020-09-15 13:58:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:58:54,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:54,334 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:54,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-15 13:58:54,535 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:54,535 INFO L82 PathProgramCache]: Analyzing trace with hash -742519718, now seen corresponding path program 259 times [2020-09-15 13:58:54,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:54,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380517585] [2020-09-15 13:58:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:56,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380517585] [2020-09-15 13:58:56,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975554786] [2020-09-15 13:58:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:58:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:58:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:58:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:58:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:58:56,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:58:56,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:58:56,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [428881921] [2020-09-15 13:58:56,107 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:58:56,109 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:58:56,121 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:58:56,121 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:58:56,123 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:56,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:56,231 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:58:56,231 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:58:56,253 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [124678#(and (<= ~j~0 14) (<= ~i~0 46))] [2020-09-15 13:58:56,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:58:56,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:58:56,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:58:56,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:58:56,254 INFO L87 Difference]: Start difference. First operand 105 states and 262 transitions. Second operand 37 states. [2020-09-15 13:58:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:58:59,635 INFO L93 Difference]: Finished difference Result 167 states and 388 transitions. [2020-09-15 13:58:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-15 13:58:59,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:58:59,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:58:59,639 INFO L225 Difference]: With dead ends: 167 [2020-09-15 13:58:59,639 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 13:58:59,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1526, Invalid=4480, Unknown=0, NotChecked=0, Total=6006 [2020-09-15 13:58:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 13:58:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2020-09-15 13:58:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-15 13:58:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 268 transitions. [2020-09-15 13:58:59,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 268 transitions. Word has length 40 [2020-09-15 13:58:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:58:59,642 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 268 transitions. [2020-09-15 13:58:59,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:58:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 268 transitions. [2020-09-15 13:58:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:58:59,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:58:59,642 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:58:59,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-15 13:58:59,843 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:58:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:58:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash 308464060, now seen corresponding path program 260 times [2020-09-15 13:58:59,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:58:59,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820010972] [2020-09-15 13:58:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:58:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:01,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820010972] [2020-09-15 13:59:01,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859795584] [2020-09-15 13:59:01,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:01,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:59:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:01,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:01,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:01,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1188266064] [2020-09-15 13:59:01,393 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:01,396 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:01,408 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:01,408 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:01,410 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:01,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:01,521 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:01,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:01,542 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [125295#(and (<= ~i~0 46) (<= ~j~0 16))] [2020-09-15 13:59:01,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:01,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:01,543 INFO L87 Difference]: Start difference. First operand 107 states and 268 transitions. Second operand 37 states. [2020-09-15 13:59:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:05,173 INFO L93 Difference]: Finished difference Result 165 states and 386 transitions. [2020-09-15 13:59:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-15 13:59:05,175 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:05,176 INFO L225 Difference]: With dead ends: 165 [2020-09-15 13:59:05,176 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 13:59:05,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1576, Invalid=4744, Unknown=0, NotChecked=0, Total=6320 [2020-09-15 13:59:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 13:59:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 109. [2020-09-15 13:59:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-15 13:59:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 274 transitions. [2020-09-15 13:59:05,178 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 274 transitions. Word has length 40 [2020-09-15 13:59:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:05,179 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 274 transitions. [2020-09-15 13:59:05,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 274 transitions. [2020-09-15 13:59:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:05,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:05,179 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:05,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:05,381 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:05,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1954248606, now seen corresponding path program 261 times [2020-09-15 13:59:05,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:05,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439547933] [2020-09-15 13:59:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:06,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439547933] [2020-09-15 13:59:06,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861891720] [2020-09-15 13:59:06,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:06,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-15 13:59:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:06,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:06,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:06,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:06,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [825561035] [2020-09-15 13:59:06,922 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:06,926 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:06,938 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:06,939 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:06,941 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:06,941 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:07,045 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:07,045 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:07,067 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [125918#(and (<= ~i~0 46) (<= ~j~0 18))] [2020-09-15 13:59:07,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:07,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:07,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:07,068 INFO L87 Difference]: Start difference. First operand 109 states and 274 transitions. Second operand 37 states. [2020-09-15 13:59:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:10,955 INFO L93 Difference]: Finished difference Result 163 states and 384 transitions. [2020-09-15 13:59:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-15 13:59:10,957 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:10,958 INFO L225 Difference]: With dead ends: 163 [2020-09-15 13:59:10,958 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 13:59:10,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1642, Invalid=5000, Unknown=0, NotChecked=0, Total=6642 [2020-09-15 13:59:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 13:59:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 111. [2020-09-15 13:59:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-15 13:59:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-09-15 13:59:10,961 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 40 [2020-09-15 13:59:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:10,961 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-09-15 13:59:10,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-09-15 13:59:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:10,962 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:11,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:11,163 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1330263552, now seen corresponding path program 262 times [2020-09-15 13:59:11,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:11,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951661297] [2020-09-15 13:59:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:12,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951661297] [2020-09-15 13:59:12,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364020385] [2020-09-15 13:59:12,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:12,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:59:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:12,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:12,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:12,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [476932992] [2020-09-15 13:59:12,650 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:12,653 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:12,685 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:12,685 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:12,688 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:12,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:12,799 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:12,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:12,821 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [126547#(and (<= ~i~0 46) (<= ~j~0 20))] [2020-09-15 13:59:12,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:12,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:12,822 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 37 states. [2020-09-15 13:59:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:16,932 INFO L93 Difference]: Finished difference Result 161 states and 382 transitions. [2020-09-15 13:59:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-15 13:59:16,935 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:16,935 INFO L225 Difference]: With dead ends: 161 [2020-09-15 13:59:16,935 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 13:59:16,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1724, Invalid=5248, Unknown=0, NotChecked=0, Total=6972 [2020-09-15 13:59:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 13:59:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2020-09-15 13:59:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-15 13:59:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 286 transitions. [2020-09-15 13:59:16,938 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 286 transitions. Word has length 40 [2020-09-15 13:59:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:16,939 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 286 transitions. [2020-09-15 13:59:16,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 286 transitions. [2020-09-15 13:59:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:16,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:16,939 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:17,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:17,140 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:17,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1575410462, now seen corresponding path program 263 times [2020-09-15 13:59:17,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:17,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203144177] [2020-09-15 13:59:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:18,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203144177] [2020-09-15 13:59:18,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892393582] [2020-09-15 13:59:18,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:18,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-15 13:59:18,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:18,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:18,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:18,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:18,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [121035353] [2020-09-15 13:59:18,640 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:18,643 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:18,655 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:18,655 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:18,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:18,657 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:18,766 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:18,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:18,789 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [127182#(and (<= ~i~0 46) (<= ~j~0 22))] [2020-09-15 13:59:18,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:18,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:18,790 INFO L87 Difference]: Start difference. First operand 113 states and 286 transitions. Second operand 37 states. [2020-09-15 13:59:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:23,155 INFO L93 Difference]: Finished difference Result 159 states and 380 transitions. [2020-09-15 13:59:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-15 13:59:23,158 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:23,159 INFO L225 Difference]: With dead ends: 159 [2020-09-15 13:59:23,159 INFO L226 Difference]: Without dead ends: 153 [2020-09-15 13:59:23,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1822, Invalid=5488, Unknown=0, NotChecked=0, Total=7310 [2020-09-15 13:59:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-15 13:59:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2020-09-15 13:59:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-15 13:59:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 292 transitions. [2020-09-15 13:59:23,162 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 292 transitions. Word has length 40 [2020-09-15 13:59:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:23,162 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 292 transitions. [2020-09-15 13:59:23,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 292 transitions. [2020-09-15 13:59:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:23,163 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:23,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:23,364 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -130390972, now seen corresponding path program 264 times [2020-09-15 13:59:23,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:23,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163588876] [2020-09-15 13:59:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:24,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163588876] [2020-09-15 13:59:24,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030729415] [2020-09-15 13:59:24,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:24,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-15 13:59:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:24,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:24,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:24,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [399676757] [2020-09-15 13:59:24,855 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:24,857 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:24,870 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:24,870 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:24,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:24,873 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:24,977 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:24,977 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:25,000 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [127823#(and (<= ~i~0 46) (<= ~j~0 24))] [2020-09-15 13:59:25,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:25,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:25,001 INFO L87 Difference]: Start difference. First operand 115 states and 292 transitions. Second operand 37 states. [2020-09-15 13:59:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:29,597 INFO L93 Difference]: Finished difference Result 157 states and 378 transitions. [2020-09-15 13:59:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-15 13:59:29,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:29,600 INFO L225 Difference]: With dead ends: 157 [2020-09-15 13:59:29,601 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 13:59:29,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1936, Invalid=5720, Unknown=0, NotChecked=0, Total=7656 [2020-09-15 13:59:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 13:59:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2020-09-15 13:59:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-15 13:59:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 298 transitions. [2020-09-15 13:59:29,604 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 298 transitions. Word has length 40 [2020-09-15 13:59:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:29,604 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 298 transitions. [2020-09-15 13:59:29,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 298 transitions. [2020-09-15 13:59:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:29,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:29,605 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:29,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-15 13:59:29,805 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash -888663002, now seen corresponding path program 265 times [2020-09-15 13:59:29,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:29,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789022609] [2020-09-15 13:59:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:31,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789022609] [2020-09-15 13:59:31,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116487037] [2020-09-15 13:59:31,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:31,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:31,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:31,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:31,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383411660] [2020-09-15 13:59:31,271 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:31,274 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:31,286 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:31,286 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:31,289 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:31,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:31,398 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:31,398 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:31,421 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [128470#(and (<= ~j~0 26) (<= ~i~0 46))] [2020-09-15 13:59:31,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:31,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:31,422 INFO L87 Difference]: Start difference. First operand 117 states and 298 transitions. Second operand 37 states. [2020-09-15 13:59:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:36,257 INFO L93 Difference]: Finished difference Result 155 states and 376 transitions. [2020-09-15 13:59:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:59:36,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:36,260 INFO L225 Difference]: With dead ends: 155 [2020-09-15 13:59:36,260 INFO L226 Difference]: Without dead ends: 149 [2020-09-15 13:59:36,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2066, Invalid=5944, Unknown=0, NotChecked=0, Total=8010 [2020-09-15 13:59:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-15 13:59:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2020-09-15 13:59:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 13:59:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 304 transitions. [2020-09-15 13:59:36,263 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 304 transitions. Word has length 40 [2020-09-15 13:59:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:36,263 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 304 transitions. [2020-09-15 13:59:36,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 304 transitions. [2020-09-15 13:59:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:36,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:36,264 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:36,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-15 13:59:36,465 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1675908232, now seen corresponding path program 266 times [2020-09-15 13:59:36,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:36,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057266082] [2020-09-15 13:59:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:37,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057266082] [2020-09-15 13:59:37,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034071027] [2020-09-15 13:59:37,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:59:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:37,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:37,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:37,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:37,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [503297296] [2020-09-15 13:59:37,944 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:37,947 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:37,960 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:37,960 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:37,963 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:37,963 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:38,072 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:38,072 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:38,095 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [129123#(and (<= ~j~0 28) (<= ~i~0 46))] [2020-09-15 13:59:38,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:38,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:38,096 INFO L87 Difference]: Start difference. First operand 119 states and 304 transitions. Second operand 37 states. [2020-09-15 13:59:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:43,229 INFO L93 Difference]: Finished difference Result 153 states and 374 transitions. [2020-09-15 13:59:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-15 13:59:43,232 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:43,233 INFO L225 Difference]: With dead ends: 153 [2020-09-15 13:59:43,233 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 13:59:43,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2212, Invalid=6160, Unknown=0, NotChecked=0, Total=8372 [2020-09-15 13:59:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 13:59:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-09-15 13:59:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 13:59:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 310 transitions. [2020-09-15 13:59:43,236 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 310 transitions. Word has length 40 [2020-09-15 13:59:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:43,236 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 310 transitions. [2020-09-15 13:59:43,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 310 transitions. [2020-09-15 13:59:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:43,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:43,237 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:43,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-15 13:59:43,438 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1043940714, now seen corresponding path program 267 times [2020-09-15 13:59:43,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:43,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192711006] [2020-09-15 13:59:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:44,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192711006] [2020-09-15 13:59:44,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195108688] [2020-09-15 13:59:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:44,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-09-15 13:59:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:44,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:44,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:44,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230054925] [2020-09-15 13:59:44,933 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:44,936 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:44,948 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:44,949 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:44,951 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:44,951 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:45,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:45,057 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:45,080 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [129782#(and (<= ~j~0 30) (<= ~i~0 46))] [2020-09-15 13:59:45,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:45,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:45,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:45,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:45,081 INFO L87 Difference]: Start difference. First operand 121 states and 310 transitions. Second operand 37 states. [2020-09-15 13:59:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:50,449 INFO L93 Difference]: Finished difference Result 151 states and 372 transitions. [2020-09-15 13:59:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-15 13:59:50,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:50,453 INFO L225 Difference]: With dead ends: 151 [2020-09-15 13:59:50,453 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 13:59:50,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2374, Invalid=6368, Unknown=0, NotChecked=0, Total=8742 [2020-09-15 13:59:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 13:59:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2020-09-15 13:59:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-15 13:59:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 316 transitions. [2020-09-15 13:59:50,456 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 316 transitions. Word has length 40 [2020-09-15 13:59:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:50,456 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 316 transitions. [2020-09-15 13:59:50,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 316 transitions. [2020-09-15 13:59:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:50,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:50,456 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:50,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-15 13:59:50,657 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:50,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -377944372, now seen corresponding path program 268 times [2020-09-15 13:59:50,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:50,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373468222] [2020-09-15 13:59:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:52,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373468222] [2020-09-15 13:59:52,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321292739] [2020-09-15 13:59:52,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:52,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:59:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:52,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:52,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:52,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:52,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:52,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [621543050] [2020-09-15 13:59:52,145 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:52,148 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:52,160 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:52,161 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:52,163 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:52,163 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:52,270 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:52,270 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:52,293 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [130447#(and (<= ~i~0 46) (<= ~j~0 32))] [2020-09-15 13:59:52,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:52,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:52,294 INFO L87 Difference]: Start difference. First operand 123 states and 316 transitions. Second operand 37 states. [2020-09-15 13:59:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:59:57,864 INFO L93 Difference]: Finished difference Result 149 states and 370 transitions. [2020-09-15 13:59:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-15 13:59:57,867 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-09-15 13:59:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:59:57,867 INFO L225 Difference]: With dead ends: 149 [2020-09-15 13:59:57,868 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 13:59:57,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2552, Invalid=6568, Unknown=0, NotChecked=0, Total=9120 [2020-09-15 13:59:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 13:59:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2020-09-15 13:59:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-15 13:59:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 322 transitions. [2020-09-15 13:59:57,871 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 322 transitions. Word has length 40 [2020-09-15 13:59:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:59:57,871 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 322 transitions. [2020-09-15 13:59:57,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-15 13:59:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 322 transitions. [2020-09-15 13:59:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-15 13:59:57,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:59:57,872 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:59:58,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-15 13:59:58,076 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:59:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:59:58,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1797109934, now seen corresponding path program 269 times [2020-09-15 13:59:58,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:59:58,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017501210] [2020-09-15 13:59:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:59:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:59:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:59,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017501210] [2020-09-15 13:59:59,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341396176] [2020-09-15 13:59:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:59:59,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-15 13:59:59,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:59:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2020-09-15 13:59:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:59:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:59:59,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:59:59,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-09-15 13:59:59,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [731159837] [2020-09-15 13:59:59,620 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:59:59,623 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:59:59,636 INFO L274 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-09-15 13:59:59,636 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:59:59,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:59,638 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:59,746 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:59:59,746 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:59:59,769 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [131118#(and (<= ~i~0 46) (<= ~j~0 34))] [2020-09-15 13:59:59,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-15 13:59:59,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:59:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-15 13:59:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 13:59:59,770 INFO L87 Difference]: Start difference. First operand 125 states and 322 transitions. Second operand 37 states.