/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:54:00,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:54:00,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:54:00,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:54:00,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:54:00,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:54:00,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:54:00,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:54:00,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:54:00,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:54:00,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:54:00,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:54:00,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:54:00,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:54:00,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:54:00,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:54:00,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:54:00,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:54:00,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:54:00,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:54:00,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:54:00,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:54:00,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:54:00,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:54:00,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 14:54:00,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 14:54:00,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 14:54:00,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 14:54:00,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 14:54:00,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 14:54:00,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:54:00,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:54:00,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:54:00,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:54:00,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:54:00,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:54:00,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:54:00,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:54:00,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:54:00,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:54:00,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:54:00,131 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-17 14:54:00,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:54:00,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:54:00,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:54:00,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:54:00,185 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:54:00,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:54:00,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:54:00,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:54:00,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:54:00,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:54:00,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:54:00,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:54:00,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:54:00,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:54:00,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:54:00,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:54:00,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:54:00,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:54:00,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:54:00,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:54:00,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:54:00,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:54:00,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:54:00,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:54:00,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:54:00,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:54:00,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:54:00,191 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-17 14:54:00,191 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:54:00,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:54:00,191 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-17 14:54:00,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:54:00,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:54:00,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:54:00,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:54:00,663 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:54:00,665 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-17 14:54:00,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8057d592/8cfc7d9d9b5f4d11aad2e625b8086cdc/FLAG77ba55de5 [2020-09-17 14:54:01,340 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:54:01,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-17 14:54:01,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8057d592/8cfc7d9d9b5f4d11aad2e625b8086cdc/FLAG77ba55de5 [2020-09-17 14:54:01,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8057d592/8cfc7d9d9b5f4d11aad2e625b8086cdc [2020-09-17 14:54:01,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:54:01,650 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:54:01,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:54:01,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:54:01,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:54:01,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:54:01" (1/1) ... [2020-09-17 14:54:01,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48eb21b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:01, skipping insertion in model container [2020-09-17 14:54:01,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:54:01" (1/1) ... [2020-09-17 14:54:01,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:54:01,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:54:02,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:54:02,296 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:54:02,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:54:02,462 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:54:02,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02 WrapperNode [2020-09-17 14:54:02,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:54:02,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:54:02,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:54:02,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:54:02,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:54:02,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:54:02,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:54:02,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:54:02,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... [2020-09-17 14:54:02,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:54:02,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:54:02,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:54:02,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:54:02,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:54:02,630 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 14:54:02,631 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 14:54:02,631 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 14:54:02,632 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 14:54:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:54:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 14:54:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:54:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:54:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 14:54:02,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:54:02,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:54:02,637 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 14:54:03,009 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:54:03,010 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 14:54:03,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:54:03 BoogieIcfgContainer [2020-09-17 14:54:03,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:54:03,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:54:03,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:54:03,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:54:03,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:54:01" (1/3) ... [2020-09-17 14:54:03,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586bf80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:54:03, skipping insertion in model container [2020-09-17 14:54:03,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:54:02" (2/3) ... [2020-09-17 14:54:03,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@586bf80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:54:03, skipping insertion in model container [2020-09-17 14:54:03,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:54:03" (3/3) ... [2020-09-17 14:54:03,024 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-17 14:54:03,036 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:54:03,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:54:03,047 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:54:03,048 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:54:03,073 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,073 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,075 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,075 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,076 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,076 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,077 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,077 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,080 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,080 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,081 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,099 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,099 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,100 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,100 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,100 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,100 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:54:03,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 14:54:03,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:54:03,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:54:03,148 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:54:03,148 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-17 14:54:03,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:54:03,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:54:03,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:54:03,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:54:03,164 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 14:54:03,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:54:03,208 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:54:03,208 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:54:03,220 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:54:03,224 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 14:54:03,244 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 14:54:03,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 14:54:03,245 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 14:54:03,247 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 14:54:03,248 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:54:04,261 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 14:54:04,481 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 14:54:04,482 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 14:54:04,486 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 14:54:04,500 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 14:54:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 14:54:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 14:54:04,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:04,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 14:54:04,513 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 14:54:04,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:04,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598110275] [2020-09-17 14:54:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:04,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598110275] [2020-09-17 14:54:04,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:54:04,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 14:54:04,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574249733] [2020-09-17 14:54:04,830 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:04,834 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:04,851 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-17 14:54:04,851 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:04,853 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:54:04,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 14:54:04,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 14:54:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 14:54:04,876 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 14:54:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:04,948 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 14:54:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 14:54:04,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 14:54:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:04,965 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:04,966 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 14:54:04,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:54:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 14:54:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 14:54:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 14:54:05,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 14:54:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:05,017 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 14:54:05,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 14:54:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 14:54:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:54:05,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:05,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:05,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:54:05,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 14:54:05,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:05,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962449897] [2020-09-17 14:54:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962449897] [2020-09-17 14:54:05,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:54:05,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:54:05,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2027825627] [2020-09-17 14:54:05,192 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:05,192 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:05,196 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-17 14:54:05,196 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:05,219 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 14:54:05,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 14:54:05,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 14:54:05,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:54:05,222 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 14:54:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:05,256 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 14:54:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 14:54:05,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 14:54:05,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:05,258 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:54:05,258 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:54:05,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 14:54:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:54:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:54:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 14:54:05,267 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 14:54:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:05,269 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 14:54:05,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 14:54:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 14:54:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 14:54:05,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:05,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:05,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 14:54:05,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 14:54:05,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:05,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856933353] [2020-09-17 14:54:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856933353] [2020-09-17 14:54:05,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:54:05,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 14:54:05,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1491416019] [2020-09-17 14:54:05,355 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:05,356 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:05,359 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-17 14:54:05,359 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:05,367 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,423 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:05,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 14:54:05,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:05,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 14:54:05,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-17 14:54:05,425 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-17 14:54:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:05,547 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-17 14:54:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 14:54:05,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-17 14:54:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:05,548 INFO L225 Difference]: With dead ends: 62 [2020-09-17 14:54:05,549 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 14:54:05,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 14:54:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-17 14:54:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 14:54:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 14:54:05,556 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-17 14:54:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:05,556 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 14:54:05,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 14:54:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 14:54:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:54:05,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:05,557 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:05,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 14:54:05,558 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-17 14:54:05,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:05,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140531285] [2020-09-17 14:54:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140531285] [2020-09-17 14:54:05,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614285036] [2020-09-17 14:54:05,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:05,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:05,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:54:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:05,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:05,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:54:05,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2120152531] [2020-09-17 14:54:05,739 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:05,740 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:05,743 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-17 14:54:05,743 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:05,745 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,745 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,771 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,786 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,787 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,827 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,841 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,842 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,861 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,862 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,889 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,889 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:05,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:05,921 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-17 14:54:05,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:05,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:54:05,923 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-17 14:54:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:06,088 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-17 14:54:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:54:06,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:54:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:06,090 INFO L225 Difference]: With dead ends: 56 [2020-09-17 14:54:06,091 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 14:54:06,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 14:54:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 14:54:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-17 14:54:06,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-17 14:54:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:06,099 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-17 14:54:06,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-17 14:54:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:54:06,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:06,100 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:06,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,302 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:06,302 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-17 14:54:06,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:06,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351911192] [2020-09-17 14:54:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351911192] [2020-09-17 14:54:06,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303033187] [2020-09-17 14:54:06,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 14:54:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:54:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:06,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:06,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 14:54:06,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [775190720] [2020-09-17 14:54:06,495 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:06,496 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:06,498 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-17 14:54:06,499 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:06,500 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,500 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,539 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:06,540 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:06,554 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-17 14:54:06,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 14:54:06,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 14:54:06,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-17 14:54:06,556 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-17 14:54:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:06,759 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-17 14:54:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:54:06,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 14:54:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:06,760 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:54:06,761 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:54:06,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:54:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:54:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-17 14:54:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:54:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-17 14:54:06,768 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-17 14:54:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:06,768 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-17 14:54:06,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 14:54:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-17 14:54:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:54:06,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:06,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:06,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:06,983 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-17 14:54:06,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:06,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756975371] [2020-09-17 14:54:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756975371] [2020-09-17 14:54:07,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467576467] [2020-09-17 14:54:07,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:07,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:07,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:54:07,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:07,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:54:07,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2039659212] [2020-09-17 14:54:07,180 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:07,181 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:07,184 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-17 14:54:07,184 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:07,189 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,189 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,255 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,256 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,285 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:54:07,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:54:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:07,287 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-17 14:54:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:07,485 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-17 14:54:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:54:07,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:54:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:07,487 INFO L225 Difference]: With dead ends: 64 [2020-09-17 14:54:07,488 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 14:54:07,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 14:54:07,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 14:54:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 14:54:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 14:54:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-17 14:54:07,494 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-17 14:54:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:07,495 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-17 14:54:07,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:54:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-17 14:54:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 14:54:07,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:07,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:07,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:07,699 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-17 14:54:07,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:07,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768846187] [2020-09-17 14:54:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768846187] [2020-09-17 14:54:07,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997894627] [2020-09-17 14:54:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:07,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:54:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:07,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:07,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 14:54:07,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [533406010] [2020-09-17 14:54:07,866 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:07,867 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:07,871 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-17 14:54:07,872 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:07,873 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,874 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,918 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:07,918 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:07,935 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-17 14:54:07,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:54:07,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:54:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:54:07,937 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-17 14:54:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:08,186 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-17 14:54:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 14:54:08,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 14:54:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:08,187 INFO L225 Difference]: With dead ends: 63 [2020-09-17 14:54:08,188 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 14:54:08,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:54:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 14:54:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-17 14:54:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 14:54:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 14:54:08,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-17 14:54:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:08,194 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 14:54:08,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:54:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 14:54:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:08,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:08,195 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:08,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:08,407 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-17 14:54:08,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:08,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261357300] [2020-09-17 14:54:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:08,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261357300] [2020-09-17 14:54:08,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098118419] [2020-09-17 14:54:08,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:08,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 14:54:08,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:08,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:08,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:08,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [73234595] [2020-09-17 14:54:08,624 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:08,625 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:08,633 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-17 14:54:08,633 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:08,635 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,636 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,657 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,682 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,715 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,715 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,739 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,740 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,747 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:08,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:08,757 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-17 14:54:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:08,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:08,759 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-17 14:54:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:08,966 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-17 14:54:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:54:08,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:08,967 INFO L225 Difference]: With dead ends: 60 [2020-09-17 14:54:08,967 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:54:08,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:54:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:54:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 14:54:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:54:08,973 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-17 14:54:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:08,974 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:54:08,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:54:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:08,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:08,975 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:09,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:09,188 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-17 14:54:09,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:09,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993804176] [2020-09-17 14:54:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:09,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993804176] [2020-09-17 14:54:09,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978483900] [2020-09-17 14:54:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:09,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:09,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:09,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:09,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [738435035] [2020-09-17 14:54:09,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:09,423 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:09,430 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:54:09,430 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:09,438 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:09,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:09,479 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:09,480 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:09,495 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-17 14:54:09,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:09,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:09,497 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-17 14:54:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:09,764 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 14:54:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:09,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:09,765 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:54:09,765 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 14:54:09,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:54:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 14:54:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 14:54:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 14:54:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-17 14:54:09,773 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-17 14:54:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:09,775 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-17 14:54:09,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-17 14:54:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 14:54:09,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:09,776 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:09,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:09,988 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:09,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-17 14:54:09,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:09,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164624288] [2020-09-17 14:54:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:10,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164624288] [2020-09-17 14:54:10,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267471721] [2020-09-17 14:54:10,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:10,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:10,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:54:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:10,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:10,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 14:54:10,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [300570791] [2020-09-17 14:54:10,171 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:10,173 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:10,175 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-17 14:54:10,175 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:10,178 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:10,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:10,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:10,213 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:10,224 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:10,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 14:54:10,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:10,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 14:54:10,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 14:54:10,226 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-17 14:54:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:10,568 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-17 14:54:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:54:10,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 14:54:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:10,570 INFO L225 Difference]: With dead ends: 74 [2020-09-17 14:54:10,570 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 14:54:10,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:54:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 14:54:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-17 14:54:10,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 14:54:10,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-17 14:54:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:10,576 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 14:54:10,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 14:54:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 14:54:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:10,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:10,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:10,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 14:54:10,790 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-17 14:54:10,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:10,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734599645] [2020-09-17 14:54:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:10,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734599645] [2020-09-17 14:54:10,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216476916] [2020-09-17 14:54:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:10,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:54:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:10,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:11,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:11,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [232687278] [2020-09-17 14:54:11,020 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:11,021 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:11,024 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-17 14:54:11,024 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:11,029 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,029 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,063 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,063 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,074 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:11,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:11,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:11,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:11,075 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-17 14:54:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:11,259 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-17 14:54:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 14:54:11,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:11,261 INFO L225 Difference]: With dead ends: 70 [2020-09-17 14:54:11,261 INFO L226 Difference]: Without dead ends: 64 [2020-09-17 14:54:11,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:54:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-17 14:54:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-17 14:54:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 14:54:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-17 14:54:11,269 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-17 14:54:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:11,269 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-17 14:54:11,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-17 14:54:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:11,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:11,273 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:11,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-17 14:54:11,474 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-17 14:54:11,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:11,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087166518] [2020-09-17 14:54:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087166518] [2020-09-17 14:54:11,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121207808] [2020-09-17 14:54:11,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:11,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:11,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:11,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:11,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:11,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:11,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [370332392] [2020-09-17 14:54:11,653 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:11,654 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:11,656 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:54:11,656 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:11,664 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,694 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:11,695 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:11,706 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-17 14:54:11,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:11,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:11,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:11,707 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-17 14:54:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:12,035 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 14:54:12,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:12,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:12,036 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:54:12,036 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:54:12,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-17 14:54:12,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:54:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-17 14:54:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 14:54:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-17 14:54:12,043 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-17 14:54:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:12,043 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-17 14:54:12,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-17 14:54:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:54:12,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:12,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:12,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:12,256 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-17 14:54:12,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331297440] [2020-09-17 14:54:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:12,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331297440] [2020-09-17 14:54:12,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842439912] [2020-09-17 14:54:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:12,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 14:54:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:54:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:12,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:12,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 14:54:12,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [858008538] [2020-09-17 14:54:12,424 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:12,428 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:12,432 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-17 14:54:12,432 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:12,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,481 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:12,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:12,500 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-17 14:54:12,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:54:12,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:54:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:54:12,501 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-17 14:54:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:12,858 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-17 14:54:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:54:12,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 14:54:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:12,860 INFO L225 Difference]: With dead ends: 69 [2020-09-17 14:54:12,860 INFO L226 Difference]: Without dead ends: 57 [2020-09-17 14:54:12,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-17 14:54:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-17 14:54:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-17 14:54:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 14:54:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 14:54:12,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-17 14:54:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:12,868 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 14:54:12,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:54:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 14:54:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:12,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:12,869 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:13,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:13,078 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:13,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:13,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-17 14:54:13,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:13,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779116714] [2020-09-17 14:54:13,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:13,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779116714] [2020-09-17 14:54:13,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580445925] [2020-09-17 14:54:13,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:13,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:54:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:13,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:13,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:13,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:13,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1337804748] [2020-09-17 14:54:13,270 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:13,272 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:13,275 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-17 14:54:13,275 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:13,276 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,276 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,307 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,324 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,325 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,330 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,330 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,341 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,342 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,361 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,362 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,376 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,403 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:13,404 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:13,420 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-17 14:54:13,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:13,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:13,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:13,421 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-17 14:54:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:13,650 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-17 14:54:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:13,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:13,652 INFO L225 Difference]: With dead ends: 66 [2020-09-17 14:54:13,652 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 14:54:13,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:54:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 14:54:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 14:54:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:54:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 14:54:13,661 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-17 14:54:13,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:13,661 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 14:54:13,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 14:54:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:13,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:13,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:54:13,865 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:13,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-17 14:54:13,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:13,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586821712] [2020-09-17 14:54:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:13,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586821712] [2020-09-17 14:54:13,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701965522] [2020-09-17 14:54:13,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:14,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:14,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:14,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:14,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1240959604] [2020-09-17 14:54:14,037 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:14,039 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:14,041 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:14,041 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:14,044 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,045 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,080 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,090 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-17 14:54:14,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:14,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:14,091 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-17 14:54:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:14,374 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-17 14:54:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:14,375 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:14,375 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:54:14,376 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 14:54:14,376 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 [2020-09-17 14:54:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 14:54:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 14:54:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 14:54:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-17 14:54:14,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-17 14:54:14,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:14,386 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-17 14:54:14,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:14,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-17 14:54:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:14,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:14,387 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:14,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 14:54:14,598 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:14,598 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-17 14:54:14,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:14,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361871277] [2020-09-17 14:54:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:14,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361871277] [2020-09-17 14:54:14,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021291513] [2020-09-17 14:54:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:14,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:14,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:14,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:14,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1989299539] [2020-09-17 14:54:14,791 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:14,793 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:14,798 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:14,798 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:14,799 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,839 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:14,839 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:14,852 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:14,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:14,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:14,853 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-17 14:54:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:15,232 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 14:54:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:15,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:15,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:15,234 INFO L225 Difference]: With dead ends: 81 [2020-09-17 14:54:15,234 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 14:54:15,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-17 14:54:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 14:54:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-17 14:54:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:54:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-17 14:54:15,244 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-17 14:54:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:15,244 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-17 14:54:15,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-17 14:54:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 14:54:15,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:15,245 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:15,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:54:15,446 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-17 14:54:15,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:15,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563177465] [2020-09-17 14:54:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:15,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563177465] [2020-09-17 14:54:15,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521784682] [2020-09-17 14:54:15,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:15,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 14:54:15,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:15,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:54:15,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:15,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:15,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 14:54:15,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2139307421] [2020-09-17 14:54:15,624 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:15,625 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:15,626 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-17 14:54:15,627 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:15,629 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:15,629 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:15,660 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:15,660 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:15,669 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-17 14:54:15,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:54:15,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:54:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:54:15,671 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-17 14:54:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:16,073 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-17 14:54:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:54:16,075 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 14:54:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:16,076 INFO L225 Difference]: With dead ends: 82 [2020-09-17 14:54:16,076 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 14:54:16,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:54:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 14:54:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-17 14:54:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 14:54:16,080 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-17 14:54:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:16,080 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 14:54:16,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:54:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 14:54:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:16,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:16,081 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:16,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:16,292 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-17 14:54:16,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:16,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612538553] [2020-09-17 14:54:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:16,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612538553] [2020-09-17 14:54:16,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116294287] [2020-09-17 14:54:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:16,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:16,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:16,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1776824537] [2020-09-17 14:54:16,512 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:16,513 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:16,516 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-17 14:54:16,517 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:16,518 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:16,518 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:16,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:16,559 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:16,574 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:16,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:16,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:16,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:16,575 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-17 14:54:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:16,829 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 14:54:16,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 14:54:16,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:16,831 INFO L225 Difference]: With dead ends: 78 [2020-09-17 14:54:16,831 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 14:54:16,832 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 [2020-09-17 14:54:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 14:54:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-17 14:54:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 14:54:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-17 14:54:16,835 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-17 14:54:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:16,835 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-17 14:54:16,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-17 14:54:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:16,836 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:17,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:54:17,048 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-17 14:54:17,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:17,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570348008] [2020-09-17 14:54:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:17,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570348008] [2020-09-17 14:54:17,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467543758] [2020-09-17 14:54:17,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:17,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 14:54:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:17,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:17,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:17,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:17,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722725598] [2020-09-17 14:54:17,249 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:17,251 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:17,254 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:17,254 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:17,256 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:17,257 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:17,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:17,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:17,310 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-17 14:54:17,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:17,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:17,312 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-17 14:54:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:17,679 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-17 14:54:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:17,680 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:17,681 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:17,682 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:54:17,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-17 14:54:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:54:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 14:54:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 14:54:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-17 14:54:17,685 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-17 14:54:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:17,685 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-17 14:54:17,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-17 14:54:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:17,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:17,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:17,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:17,897 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-17 14:54:17,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:17,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914414276] [2020-09-17 14:54:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914414276] [2020-09-17 14:54:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402382186] [2020-09-17 14:54:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:18,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 14:54:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:18,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:18,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1785473057] [2020-09-17 14:54:18,090 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:18,091 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:18,094 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:18,094 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:18,099 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:18,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:18,130 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:18,130 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:18,146 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-17 14:54:18,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:18,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:18,147 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-17 14:54:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:18,557 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-17 14:54:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:18,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:18,559 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:18,559 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 14:54:18,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-17 14:54:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 14:54:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-17 14:54:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 14:54:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-17 14:54:18,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-17 14:54:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:18,564 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-17 14:54:18,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-17 14:54:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:54:18,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:18,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:18,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:18,776 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-17 14:54:18,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:18,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201325652] [2020-09-17 14:54:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201325652] [2020-09-17 14:54:18,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796358464] [2020-09-17 14:54:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:18,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:54:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:18,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:18,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 14:54:18,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1039355624] [2020-09-17 14:54:18,986 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:18,987 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:18,990 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-17 14:54:18,990 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:18,991 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:18,991 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,029 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,030 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,042 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (< ~i~0 16) (<= ~j~0 14))] [2020-09-17 14:54:19,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:54:19,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:54:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:54:19,043 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-17 14:54:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:19,463 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-17 14:54:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 14:54:19,464 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 14:54:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:19,464 INFO L225 Difference]: With dead ends: 75 [2020-09-17 14:54:19,465 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 14:54:19,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-17 14:54:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 14:54:19,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 14:54:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 14:54:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 14:54:19,468 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-17 14:54:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:19,468 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 14:54:19,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:54:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 14:54:19,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:19,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:19,470 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:19,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:54:19,671 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-17 14:54:19,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:19,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050828121] [2020-09-17 14:54:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:19,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050828121] [2020-09-17 14:54:19,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455167760] [2020-09-17 14:54:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:19,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:54:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:19,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:19,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:19,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523282651] [2020-09-17 14:54:19,900 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:19,901 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:19,905 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-17 14:54:19,905 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:19,906 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,943 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,943 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,960 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,960 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,967 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,967 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,974 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:19,992 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:19,992 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,011 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,012 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,017 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,024 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-17 14:54:20,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:20,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:20,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:20,025 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-17 14:54:20,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:20,391 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-17 14:54:20,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:54:20,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:20,393 INFO L225 Difference]: With dead ends: 72 [2020-09-17 14:54:20,393 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 14:54:20,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:54:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 14:54:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 14:54:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 14:54:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 14:54:20,399 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-17 14:54:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:20,400 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 14:54:20,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 14:54:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:20,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:20,401 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:20,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:20,602 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-17 14:54:20,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:20,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318129104] [2020-09-17 14:54:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:20,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318129104] [2020-09-17 14:54:20,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817718765] [2020-09-17 14:54:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:20,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:54:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:20,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:20,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:20,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1080598790] [2020-09-17 14:54:20,921 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:20,924 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:20,928 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:20,929 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:20,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,975 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:20,976 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:20,990 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-17 14:54:20,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:20,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:20,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:20,992 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-17 14:54:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:21,466 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-17 14:54:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:54:21,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:21,468 INFO L225 Difference]: With dead ends: 92 [2020-09-17 14:54:21,469 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 14:54:21,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:54:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 14:54:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-17 14:54:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 14:54:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-17 14:54:21,475 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-17 14:54:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:21,475 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-17 14:54:21,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-17 14:54:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:21,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:21,478 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:21,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 14:54:21,689 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:21,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-17 14:54:21,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:21,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793567733] [2020-09-17 14:54:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:21,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793567733] [2020-09-17 14:54:21,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86613453] [2020-09-17 14:54:21,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:21,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:54:21,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:21,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:21,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:21,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:21,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [861430500] [2020-09-17 14:54:21,916 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:21,917 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:21,920 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:21,920 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:21,923 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:21,923 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:21,956 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:21,956 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:21,965 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-17 14:54:21,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:21,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:21,966 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-17 14:54:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:22,455 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-17 14:54:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:54:22,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:22,456 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:54:22,456 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:54:22,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 14:54:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:54:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-17 14:54:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 14:54:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-17 14:54:22,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-17 14:54:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:22,461 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-17 14:54:22,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-17 14:54:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:22,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:22,462 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:22,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 14:54:22,670 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:22,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-17 14:54:22,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:22,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994164867] [2020-09-17 14:54:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994164867] [2020-09-17 14:54:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220629069] [2020-09-17 14:54:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:22,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:54:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:22,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:22,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:22,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [973097485] [2020-09-17 14:54:22,880 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:22,882 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:22,885 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:22,885 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:22,886 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:22,886 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:22,915 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:22,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:22,933 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-17 14:54:22,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:22,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:22,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:22,935 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-17 14:54:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:23,446 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-17 14:54:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 14:54:23,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:23,448 INFO L225 Difference]: With dead ends: 89 [2020-09-17 14:54:23,448 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 14:54:23,449 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 [2020-09-17 14:54:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 14:54:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 14:54:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 14:54:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-17 14:54:23,453 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-17 14:54:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:23,453 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-17 14:54:23,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-17 14:54:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 14:54:23,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:23,454 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:23,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:23,665 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-17 14:54:23,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:23,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028207420] [2020-09-17 14:54:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:54:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:23,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028207420] [2020-09-17 14:54:23,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040796026] [2020-09-17 14:54:23,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:54:23,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 14:54:23,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:54:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:54:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:54:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:54:23,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:54:23,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 14:54:23,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [255330055] [2020-09-17 14:54:23,882 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 14:54:23,884 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 14:54:23,887 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-17 14:54:23,887 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 14:54:23,888 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:23,888 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:23,921 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-17 14:54:23,921 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-17 14:54:23,931 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-17 14:54:23,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 14:54:23,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:54:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 14:54:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-17 14:54:23,932 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-17 14:54:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:54:24,541 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-17 14:54:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 14:54:24,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 14:54:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:54:24,542 INFO L225 Difference]: With dead ends: 90 [2020-09-17 14:54:24,542 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 14:54:24,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 14:54:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 14:54:24,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-17 14:54:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 14:54:24,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 14:54:24,545 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-17 14:54:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:54:24,546 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 14:54:24,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 14:54:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 14:54:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 14:54:24,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:54:24,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:54:24,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 14:54:24,748 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:54:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:54:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-17 14:54:24,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:54:24,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666379000] [2020-09-17 14:54:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:54:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 14:54:24,764 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 14:54:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 14:54:24,777 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 14:54:24,801 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-17 14:54:24,802 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-17 14:54:24,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-17 14:54:24,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 02:54:24 BasicIcfg [2020-09-17 14:54:24,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-17 14:54:24,857 INFO L168 Benchmark]: Toolchain (without parser) took 23210.85 ms. Allocated memory was 140.5 MB in the beginning and 368.6 MB in the end (delta: 228.1 MB). Free memory was 102.2 MB in the beginning and 287.3 MB in the end (delta: -185.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,857 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 811.37 ms. Allocated memory was 140.5 MB in the beginning and 207.1 MB in the end (delta: 66.6 MB). Free memory was 101.8 MB in the beginning and 167.3 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.63 ms. Allocated memory is still 207.1 MB. Free memory was 167.3 MB in the beginning and 164.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,858 INFO L168 Benchmark]: Boogie Preprocessor took 31.18 ms. Allocated memory is still 207.1 MB. Free memory was 164.4 MB in the beginning and 163.5 MB in the end (delta: 947.2 kB). Peak memory consumption was 947.2 kB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,858 INFO L168 Benchmark]: RCFGBuilder took 463.00 ms. Allocated memory is still 207.1 MB. Free memory was 163.5 MB in the beginning and 142.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,859 INFO L168 Benchmark]: TraceAbstraction took 21839.22 ms. Allocated memory was 207.1 MB in the beginning and 368.6 MB in the end (delta: 161.5 MB). Free memory was 142.9 MB in the beginning and 287.3 MB in the end (delta: -144.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-17 14:54:24,861 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 811.37 ms. Allocated memory was 140.5 MB in the beginning and 207.1 MB in the end (delta: 66.6 MB). Free memory was 101.8 MB in the beginning and 167.3 MB in the end (delta: -65.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 55.63 ms. Allocated memory is still 207.1 MB. Free memory was 167.3 MB in the beginning and 164.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.18 ms. Allocated memory is still 207.1 MB. Free memory was 164.4 MB in the beginning and 163.5 MB in the end (delta: 947.2 kB). Peak memory consumption was 947.2 kB. Max. memory is 7.1 GB. * RCFGBuilder took 463.00 ms. Allocated memory is still 207.1 MB. Free memory was 163.5 MB in the beginning and 142.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21839.22 ms. Allocated memory was 207.1 MB in the beginning and 368.6 MB in the end (delta: 161.5 MB). Free memory was 142.9 MB in the beginning and 287.3 MB in the end (delta: -144.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.6s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 374 SDtfs, 1096 SDslu, 1600 SDs, 0 SdLazy, 1735 SolverSat, 803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1130 GetRequests, 555 SyntacticMatches, 50 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 417 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 714 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 647 ConstructedInterpolants, 0 QuantifiedInterpolants, 38679 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2232 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 49 InterpolantComputations, 3 PerfectInterpolantSequences, 0/400 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...