/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 23:42:59,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 23:42:59,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 23:42:59,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 23:42:59,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 23:42:59,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 23:43:00,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 23:43:00,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 23:43:00,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 23:43:00,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 23:43:00,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 23:43:00,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 23:43:00,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 23:43:00,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 23:43:00,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 23:43:00,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 23:43:00,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 23:43:00,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 23:43:00,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 23:43:00,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 23:43:00,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 23:43:00,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 23:43:00,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 23:43:00,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 23:43:00,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 23:43:00,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 23:43:00,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 23:43:00,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 23:43:00,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 23:43:00,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 23:43:00,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 23:43:00,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 23:43:00,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 23:43:00,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 23:43:00,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 23:43:00,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 23:43:00,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 23:43:00,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 23:43:00,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 23:43:00,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 23:43:00,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 23:43:00,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-21 23:43:00,105 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 23:43:00,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 23:43:00,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 23:43:00,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 23:43:00,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 23:43:00,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 23:43:00,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 23:43:00,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 23:43:00,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 23:43:00,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 23:43:00,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 23:43:00,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 23:43:00,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 23:43:00,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 23:43:00,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 23:43:00,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 23:43:00,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 23:43:00,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 23:43:00,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 23:43:00,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 23:43:00,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 23:43:00,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 23:43:00,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 23:43:00,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 23:43:00,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 23:43:00,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 23:43:00,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 23:43:00,113 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-21 23:43:00,114 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 23:43:00,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 23:43:00,114 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-21 23:43:00,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 23:43:00,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 23:43:00,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 23:43:00,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 23:43:00,447 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 23:43:00,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 23:43:00,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16412f5bc/b82d823337c84eadb7c38d8fb492153e/FLAG6d6f34882 [2020-10-21 23:43:01,091 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 23:43:01,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-21 23:43:01,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16412f5bc/b82d823337c84eadb7c38d8fb492153e/FLAG6d6f34882 [2020-10-21 23:43:01,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16412f5bc/b82d823337c84eadb7c38d8fb492153e [2020-10-21 23:43:01,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 23:43:01,462 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 23:43:01,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 23:43:01,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 23:43:01,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 23:43:01,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:43:01" (1/1) ... [2020-10-21 23:43:01,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e334cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:01, skipping insertion in model container [2020-10-21 23:43:01,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:43:01" (1/1) ... [2020-10-21 23:43:01,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 23:43:01,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 23:43:02,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:43:02,170 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 23:43:02,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:43:02,364 INFO L208 MainTranslator]: Completed translation [2020-10-21 23:43:02,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02 WrapperNode [2020-10-21 23:43:02,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 23:43:02,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 23:43:02,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 23:43:02,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 23:43:02,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 23:43:02,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 23:43:02,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 23:43:02,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 23:43:02,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (1/1) ... [2020-10-21 23:43:02,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 23:43:02,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 23:43:02,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 23:43:02,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 23:43:02,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (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 [2020-10-21 23:43:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 23:43:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 23:43:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 23:43:02,576 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 23:43:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 23:43:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 23:43:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 23:43:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 23:43:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 23:43:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 23:43:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 23:43:02,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 23:43:02,579 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 23:43:02,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 23:43:02,959 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 23:43:02,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:43:02 BoogieIcfgContainer [2020-10-21 23:43:02,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 23:43:02,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 23:43:02,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 23:43:02,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 23:43:02,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 11:43:01" (1/3) ... [2020-10-21 23:43:02,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a392f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:43:02, skipping insertion in model container [2020-10-21 23:43:02,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:02" (2/3) ... [2020-10-21 23:43:02,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a392f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:43:02, skipping insertion in model container [2020-10-21 23:43:02,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:43:02" (3/3) ... [2020-10-21 23:43:02,971 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-21 23:43:02,984 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 23:43:02,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 23:43:02,992 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 23:43:02,993 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 23:43:03,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,020 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,020 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,021 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,021 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,021 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,022 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,022 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,022 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,024 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,024 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,024 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,025 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,025 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,025 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,025 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,026 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,026 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,026 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,027 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,027 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,031 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,031 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,032 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,032 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,032 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,032 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,040 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,040 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,041 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,041 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:03,043 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 23:43:03,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 23:43:03,080 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 23:43:03,080 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 23:43:03,080 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 23:43:03,080 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-21 23:43:03,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 23:43:03,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 23:43:03,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 23:43:03,081 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 23:43:03,095 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 23:43:03,096 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:03,098 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:03,101 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:03,145 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 23:43:03,145 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 23:43:03,150 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 23:43:03,153 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 23:43:03,980 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-21 23:43:04,399 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 23:43:04,770 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 23:43:04,904 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 23:43:04,932 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 23:43:04,932 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 23:43:04,943 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 23:43:04,969 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 23:43:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 23:43:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 23:43:04,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:04,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 23:43:04,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 23:43:05,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:05,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642057401] [2020-10-21 23:43:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:05,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642057401] [2020-10-21 23:43:05,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:05,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 23:43:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [770957951] [2020-10-21 23:43:05,201 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:05,204 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:05,218 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-21 23:43:05,218 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:05,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:05,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 23:43:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 23:43:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 23:43:05,242 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 23:43:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:05,312 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 23:43:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 23:43:05,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 23:43:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:05,325 INFO L225 Difference]: With dead ends: 75 [2020-10-21 23:43:05,326 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 23:43:05,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:43:05,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 23:43:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 23:43:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 23:43:05,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 23:43:05,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:05,370 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 23:43:05,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 23:43:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 23:43:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 23:43:05,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:05,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:05,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 23:43:05,372 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 23:43:05,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:05,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446799781] [2020-10-21 23:43:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:05,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446799781] [2020-10-21 23:43:05,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:05,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 23:43:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [796710029] [2020-10-21 23:43:05,472 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:05,473 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:05,477 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-21 23:43:05,477 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:05,528 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:05,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 23:43:05,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 23:43:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:43:05,531 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 23:43:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:05,562 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 23:43:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 23:43:05,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 23:43:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:05,564 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:05,564 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:05,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:43:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 23:43:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 23:43:05,573 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 23:43:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:05,574 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 23:43:05,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 23:43:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 23:43:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:43:05,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:05,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:05,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 23:43:05,576 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 23:43:05,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:05,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449711703] [2020-10-21 23:43:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:05,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449711703] [2020-10-21 23:43:05,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:05,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:43:05,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1447414789] [2020-10-21 23:43:05,666 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:05,667 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:05,670 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-10-21 23:43:05,671 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:05,697 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:05,698 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:05,798 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:05,800 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:05,840 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:05,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:05,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:43:05,842 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-21 23:43:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:05,989 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-10-21 23:43:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 23:43:05,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:43:05,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:05,992 INFO L225 Difference]: With dead ends: 66 [2020-10-21 23:43:05,992 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:05,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 23:43:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-21 23:43:05,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-10-21 23:43:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:06,000 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-21 23:43:06,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-21 23:43:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:43:06,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:06,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:06,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 23:43:06,002 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:06,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-10-21 23:43:06,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:06,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092529824] [2020-10-21 23:43:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092529824] [2020-10-21 23:43:06,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:06,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:43:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [720525952] [2020-10-21 23:43:06,078 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:06,079 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:06,081 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-21 23:43:06,081 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:06,128 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:06,128 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:06,194 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:06,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:43:06,195 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-10-21 23:43:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:06,263 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-21 23:43:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:43:06,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:43:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:06,266 INFO L225 Difference]: With dead ends: 67 [2020-10-21 23:43:06,267 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 23:43:06,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 23:43:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-21 23:43:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:06,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-21 23:43:06,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-10-21 23:43:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:06,274 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-21 23:43:06,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-21 23:43:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:43:06,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:06,275 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:06,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 23:43:06,276 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-10-21 23:43:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:06,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983892515] [2020-10-21 23:43:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983892515] [2020-10-21 23:43:06,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109615898] [2020-10-21 23:43:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:43:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:06,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:06,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:06,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:43:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1406934942] [2020-10-21 23:43:06,463 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:06,464 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:06,466 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-21 23:43:06,466 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:06,507 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:06,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:43:06,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:06,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:43:06,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:06,509 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-10-21 23:43:06,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:06,682 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 23:43:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:06,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 23:43:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:06,686 INFO L225 Difference]: With dead ends: 63 [2020-10-21 23:43:06,686 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 23:43:06,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 23:43:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 23:43:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 23:43:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 23:43:06,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 23:43:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:06,696 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 23:43:06,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:43:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 23:43:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:43:06,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:06,697 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:06,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:06,908 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-10-21 23:43:06,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:06,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056650157] [2020-10-21 23:43:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056650157] [2020-10-21 23:43:06,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96393670] [2020-10-21 23:43:06,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:07,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:07,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:07,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 23:43:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:07,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:07,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:43:07,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [568721919] [2020-10-21 23:43:07,083 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:07,085 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:07,087 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-10-21 23:43:07,087 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:07,141 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:07,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:43:07,142 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-10-21 23:43:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:07,270 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 23:43:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 23:43:07,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-21 23:43:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:07,272 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:07,272 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 23:43:07,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 23:43:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 23:43:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 23:43:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 23:43:07,278 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 23:43:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,278 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 23:43:07,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 23:43:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:07,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:07,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:07,490 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-10-21 23:43:07,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:07,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805602289] [2020-10-21 23:43:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805602289] [2020-10-21 23:43:07,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781229297] [2020-10-21 23:43:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:07,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:07,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:07,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:07,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 23:43:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1088751320] [2020-10-21 23:43:07,700 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:07,701 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:07,704 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-10-21 23:43:07,704 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:07,715 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,716 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,747 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,747 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,791 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,791 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,808 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:07,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:07,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:07,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:07,809 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-10-21 23:43:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:07,936 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 23:43:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:07,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:43:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:07,937 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:07,937 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:07,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-21 23:43:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 23:43:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-10-21 23:43:07,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-10-21 23:43:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,944 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-10-21 23:43:07,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-10-21 23:43:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:07,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:08,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,159 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:08,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-10-21 23:43:08,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:08,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108621578] [2020-10-21 23:43:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108621578] [2020-10-21 23:43:08,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796446019] [2020-10-21 23:43:08,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:43:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:08,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:08,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:08,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:08,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:43:08,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2047649883] [2020-10-21 23:43:08,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:08,327 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:08,329 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-21 23:43:08,329 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:08,351 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:08,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:43:08,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:43:08,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:08,353 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-10-21 23:43:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:08,563 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 23:43:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:43:08,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:43:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:08,565 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:08,565 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 23:43:08,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 23:43:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-21 23:43:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-21 23:43:08,573 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-10-21 23:43:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:08,574 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-21 23:43:08,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:43:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-21 23:43:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:08,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:08,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:08,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,778 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-10-21 23:43:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:08,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608363795] [2020-10-21 23:43:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608363795] [2020-10-21 23:43:08,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435078829] [2020-10-21 23:43:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:09,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:09,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:43:09,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764504128] [2020-10-21 23:43:09,037 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:09,039 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:09,042 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-21 23:43:09,043 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:09,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:09,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:09,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:09,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:09,118 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-10-21 23:43:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:09,288 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 23:43:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:09,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:43:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:09,290 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:09,290 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 23:43:09,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 23:43:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-10-21 23:43:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-21 23:43:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-21 23:43:09,304 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-10-21 23:43:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:09,304 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-21 23:43:09,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-21 23:43:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:43:09,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:09,307 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:09,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,519 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-10-21 23:43:09,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:09,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841559797] [2020-10-21 23:43:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841559797] [2020-10-21 23:43:09,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657483191] [2020-10-21 23:43:09,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:09,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:09,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:09,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:43:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192468120] [2020-10-21 23:43:09,691 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:09,692 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:09,695 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:43:09,695 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:09,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:09,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:43:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:43:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:09,734 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-10-21 23:43:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:09,968 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 23:43:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:09,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:43:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:09,970 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:09,970 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 23:43:09,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 23:43:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 23:43:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 23:43:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 23:43:09,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 23:43:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:09,975 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 23:43:09,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:43:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 23:43:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:43:09,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:09,976 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:10,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:10,187 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-10-21 23:43:10,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:10,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377687333] [2020-10-21 23:43:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377687333] [2020-10-21 23:43:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74894790] [2020-10-21 23:43:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:10,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 23:43:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:10,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:10,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:10,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:43:10,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1822872750] [2020-10-21 23:43:10,362 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:10,363 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:10,365 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:43:10,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:10,429 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:10,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:10,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:10,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:10,431 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 23:43:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:10,639 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 23:43:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:43:10,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:43:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:10,641 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:10,641 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 23:43:10,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 23:43:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 23:43:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 23:43:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 23:43:10,647 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 23:43:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:10,647 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 23:43:10,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 23:43:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:10,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:10,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:10,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:10,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-10-21 23:43:10,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:10,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487925970] [2020-10-21 23:43:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:10,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487925970] [2020-10-21 23:43:10,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078500404] [2020-10-21 23:43:10,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:11,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:11,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:11,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 23:43:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1263883407] [2020-10-21 23:43:11,027 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:11,028 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:11,031 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-10-21 23:43:11,031 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:11,067 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:11,068 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:11,092 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:11,092 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:11,115 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:11,115 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:11,119 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:11,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:11,121 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-10-21 23:43:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:11,311 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 23:43:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:43:11,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 23:43:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:11,313 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:11,313 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 23:43:11,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 23:43:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-21 23:43:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 23:43:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-10-21 23:43:11,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-10-21 23:43:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:11,322 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-10-21 23:43:11,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-10-21 23:43:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:11,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:11,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:11,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-21 23:43:11,536 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-10-21 23:43:11,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:11,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081549019] [2020-10-21 23:43:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081549019] [2020-10-21 23:43:11,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646655290] [2020-10-21 23:43:11,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:43:11,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:43:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:11,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 23:43:11,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234255105] [2020-10-21 23:43:11,697 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:11,698 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:11,701 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-10-21 23:43:11,701 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:11,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:11,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:43:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:43:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:11,727 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-10-21 23:43:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:12,025 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-21 23:43:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 23:43:12,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 23:43:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:12,027 INFO L225 Difference]: With dead ends: 74 [2020-10-21 23:43:12,027 INFO L226 Difference]: Without dead ends: 69 [2020-10-21 23:43:12,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-21 23:43:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-10-21 23:43:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 23:43:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-10-21 23:43:12,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-10-21 23:43:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:12,032 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-10-21 23:43:12,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:43:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-10-21 23:43:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:12,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:12,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:12,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:12,234 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-10-21 23:43:12,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:12,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770691363] [2020-10-21 23:43:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:12,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770691363] [2020-10-21 23:43:12,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817981016] [2020-10-21 23:43:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:12,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 23:43:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:12,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:43:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:12,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:12,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:12,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 23:43:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1569550539] [2020-10-21 23:43:12,409 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:12,410 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:12,412 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-21 23:43:12,413 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:12,479 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-21 23:43:12,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:43:12,481 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-10-21 23:43:12,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:12,745 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 23:43:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:12,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 23:43:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:12,747 INFO L225 Difference]: With dead ends: 82 [2020-10-21 23:43:12,747 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 23:43:12,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 23:43:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-21 23:43:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-21 23:43:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-21 23:43:12,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-10-21 23:43:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:12,752 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-21 23:43:12,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-21 23:43:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 23:43:12,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:12,753 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:12,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:12,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:12,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-10-21 23:43:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:12,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508797224] [2020-10-21 23:43:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508797224] [2020-10-21 23:43:13,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283038081] [2020-10-21 23:43:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:13,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:13,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 23:43:13,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [213699811] [2020-10-21 23:43:13,115 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:13,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:13,119 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-21 23:43:13,119 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:13,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:13,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:43:13,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:43:13,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:13,164 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-10-21 23:43:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:13,491 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 23:43:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:13,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 23:43:13,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:13,493 INFO L225 Difference]: With dead ends: 82 [2020-10-21 23:43:13,493 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 23:43:13,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-21 23:43:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 23:43:13,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 23:43:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 23:43:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 23:43:13,498 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 23:43:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:13,498 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 23:43:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:43:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 23:43:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 23:43:13,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:13,499 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:13,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 23:43:13,708 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-10-21 23:43:13,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:13,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556912133] [2020-10-21 23:43:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556912133] [2020-10-21 23:43:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834699707] [2020-10-21 23:43:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:13,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:13,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 23:43:13,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616263316] [2020-10-21 23:43:13,923 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:13,924 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:13,926 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-10-21 23:43:13,926 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:13,968 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:13,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:13,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:13,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:43:13,970 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 23:43:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:14,260 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 23:43:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 23:43:14,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-21 23:43:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:14,262 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:14,262 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 23:43:14,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 23:43:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 23:43:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 23:43:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 23:43:14,266 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 23:43:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:14,266 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 23:43:14,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 23:43:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:14,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:14,267 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:14,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 23:43:14,478 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:14,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:14,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-10-21 23:43:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:14,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235109456] [2020-10-21 23:43:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:14,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235109456] [2020-10-21 23:43:14,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332492269] [2020-10-21 23:43:14,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:14,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 23:43:14,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:14,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:14,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:14,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:14,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 23:43:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [314061256] [2020-10-21 23:43:14,667 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:14,669 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:14,674 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-10-21 23:43:14,674 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:14,704 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:14,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:14,735 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:14,735 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:14,770 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:14,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:14,772 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-10-21 23:43:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:14,981 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 23:43:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:14,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 23:43:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:14,982 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:14,982 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 23:43:14,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 23:43:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-21 23:43:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 23:43:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-21 23:43:14,986 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-10-21 23:43:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:14,987 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-21 23:43:14,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-21 23:43:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:14,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:15,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 23:43:15,198 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-10-21 23:43:15,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:15,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391991965] [2020-10-21 23:43:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:15,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391991965] [2020-10-21 23:43:15,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350465532] [2020-10-21 23:43:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:15,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:15,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:15,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:15,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:15,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 23:43:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1124749322] [2020-10-21 23:43:15,394 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:15,396 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:15,399 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-10-21 23:43:15,400 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:15,427 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:15,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:43:15,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:43:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:15,429 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-10-21 23:43:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:15,800 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-21 23:43:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 23:43:15,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 23:43:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:15,802 INFO L225 Difference]: With dead ends: 84 [2020-10-21 23:43:15,802 INFO L226 Difference]: Without dead ends: 79 [2020-10-21 23:43:15,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-21 23:43:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-21 23:43:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-21 23:43:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 23:43:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-10-21 23:43:15,807 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-10-21 23:43:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:15,807 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-10-21 23:43:15,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:43:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-10-21 23:43:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:15,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:15,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:16,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:16,019 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-10-21 23:43:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:16,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697600741] [2020-10-21 23:43:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697600741] [2020-10-21 23:43:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030522275] [2020-10-21 23:43:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:16,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 23:43:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:16,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:16,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 23:43:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [886472382] [2020-10-21 23:43:16,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:16,231 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:16,233 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-21 23:43:16,234 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:16,296 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:16,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:16,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:16,298 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-10-21 23:43:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:16,659 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 23:43:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:16,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 23:43:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:16,661 INFO L225 Difference]: With dead ends: 92 [2020-10-21 23:43:16,661 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:16,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-21 23:43:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-21 23:43:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-21 23:43:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-21 23:43:16,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-10-21 23:43:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:16,665 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-21 23:43:16,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-21 23:43:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 23:43:16,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:16,666 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:16,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:16,875 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-10-21 23:43:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623702101] [2020-10-21 23:43:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623702101] [2020-10-21 23:43:16,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525924448] [2020-10-21 23:43:16,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:17,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-21 23:43:17,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:17,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:17,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 23:43:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1380187965] [2020-10-21 23:43:17,058 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:17,059 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:17,062 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-21 23:43:17,062 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:17,096 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-21 23:43:17,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 23:43:17,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 23:43:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:17,097 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-10-21 23:43:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:17,527 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 23:43:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:17,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 23:43:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:17,529 INFO L225 Difference]: With dead ends: 92 [2020-10-21 23:43:17,529 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:17,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 23:43:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 23:43:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 23:43:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 23:43:17,534 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 23:43:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:17,534 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 23:43:17,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 23:43:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 23:43:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 23:43:17,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:17,535 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:17,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:17,741 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-10-21 23:43:17,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:17,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630021892] [2020-10-21 23:43:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630021892] [2020-10-21 23:43:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479259941] [2020-10-21 23:43:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:17,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:17,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 23:43:17,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764127889] [2020-10-21 23:43:17,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:17,952 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:17,954 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-10-21 23:43:17,954 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:18,007 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:18,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:18,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:18,008 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 23:43:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:18,413 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 23:43:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 23:43:18,420 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-21 23:43:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:18,421 INFO L225 Difference]: With dead ends: 80 [2020-10-21 23:43:18,421 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 23:43:18,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:43:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 23:43:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 23:43:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 23:43:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 23:43:18,424 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 23:43:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:18,425 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 23:43:18,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:18,425 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 23:43:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:18,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:18,426 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:18,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-21 23:43:18,633 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-10-21 23:43:18,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:18,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810876395] [2020-10-21 23:43:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:18,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810876395] [2020-10-21 23:43:18,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818705096] [2020-10-21 23:43:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:18,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:18,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:18,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 23:43:18,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1795194895] [2020-10-21 23:43:18,866 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:18,868 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:18,871 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-10-21 23:43:18,871 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:18,903 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:18,904 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:18,932 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:18,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:18,967 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:18,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:18,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:18,968 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-10-21 23:43:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:19,271 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 23:43:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 23:43:19,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 23:43:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:19,273 INFO L225 Difference]: With dead ends: 80 [2020-10-21 23:43:19,273 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 23:43:19,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:43:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 23:43:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-21 23:43:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 23:43:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-21 23:43:19,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-10-21 23:43:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:19,277 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-21 23:43:19,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-21 23:43:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:19,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:19,278 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:19,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 23:43:19,481 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-10-21 23:43:19,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:19,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634862868] [2020-10-21 23:43:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634862868] [2020-10-21 23:43:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908822259] [2020-10-21 23:43:19,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:19,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 23:43:19,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:43:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:19,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:19,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:19,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 23:43:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1110152983] [2020-10-21 23:43:19,674 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:19,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:19,678 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-10-21 23:43:19,678 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:19,696 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:19,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 23:43:19,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 23:43:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:19,697 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-10-21 23:43:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:20,184 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-21 23:43:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 23:43:20,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 23:43:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:20,186 INFO L225 Difference]: With dead ends: 94 [2020-10-21 23:43:20,186 INFO L226 Difference]: Without dead ends: 89 [2020-10-21 23:43:20,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 23:43:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-21 23:43:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-21 23:43:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-21 23:43:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-10-21 23:43:20,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-10-21 23:43:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:20,191 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-10-21 23:43:20,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 23:43:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-10-21 23:43:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:20,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:20,192 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:20,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 23:43:20,403 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:20,403 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-10-21 23:43:20,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:20,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311587341] [2020-10-21 23:43:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311587341] [2020-10-21 23:43:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470343503] [2020-10-21 23:43:20,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:20,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:43:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:20,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:20,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:20,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 23:43:20,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372492712] [2020-10-21 23:43:20,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:20,601 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:20,604 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-21 23:43:20,605 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:20,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-21 23:43:20,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:20,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:20,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:20,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:20,662 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-10-21 23:43:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:21,170 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 23:43:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:21,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 23:43:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:21,175 INFO L225 Difference]: With dead ends: 102 [2020-10-21 23:43:21,175 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 23:43:21,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:43:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 23:43:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-21 23:43:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 23:43:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-21 23:43:21,179 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-10-21 23:43:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:21,179 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-21 23:43:21,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-21 23:43:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 23:43:21,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:21,180 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:21,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 23:43:21,389 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-10-21 23:43:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:21,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196114531] [2020-10-21 23:43:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196114531] [2020-10-21 23:43:21,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29296222] [2020-10-21 23:43:21,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:21,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-21 23:43:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:21,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:21,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:21,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:21,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 23:43:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [651153379] [2020-10-21 23:43:21,592 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:21,595 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:21,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-21 23:43:21,599 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:21,644 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:21,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 23:43:21,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 23:43:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:21,645 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-10-21 23:43:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:22,201 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 23:43:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:22,202 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 23:43:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:22,202 INFO L225 Difference]: With dead ends: 102 [2020-10-21 23:43:22,202 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 23:43:22,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 23:43:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 23:43:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 23:43:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 23:43:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 23:43:22,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 23:43:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:22,206 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 23:43:22,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 23:43:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 23:43:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 23:43:22,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:22,207 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:22,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 23:43:22,416 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-10-21 23:43:22,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:22,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333928676] [2020-10-21 23:43:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333928676] [2020-10-21 23:43:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775591301] [2020-10-21 23:43:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:22,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 23:43:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:22,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:22,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:22,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 23:43:22,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877422071] [2020-10-21 23:43:22,624 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:22,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:22,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-10-21 23:43:22,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:22,677 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:22,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:22,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:22,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:22,678 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 23:43:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:23,234 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 23:43:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 23:43:23,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-21 23:43:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:23,235 INFO L225 Difference]: With dead ends: 88 [2020-10-21 23:43:23,235 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:23,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:43:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 23:43:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 23:43:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 23:43:23,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 23:43:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:23,239 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 23:43:23,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 23:43:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:23,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:23,240 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:23,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:23,441 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-10-21 23:43:23,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:23,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833994401] [2020-10-21 23:43:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833994401] [2020-10-21 23:43:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936640093] [2020-10-21 23:43:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:23,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:23,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:23,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 23:43:23,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1992018314] [2020-10-21 23:43:23,679 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:23,681 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:23,685 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-10-21 23:43:23,686 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:23,689 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:23,690 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:23,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:23,742 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:23,760 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:23,761 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:23,767 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:23,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:23,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:23,768 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-10-21 23:43:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:24,097 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 23:43:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:24,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 23:43:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:24,099 INFO L225 Difference]: With dead ends: 88 [2020-10-21 23:43:24,099 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 23:43:24,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:43:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 23:43:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-21 23:43:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 23:43:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-21 23:43:24,104 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-10-21 23:43:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:24,104 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-21 23:43:24,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-21 23:43:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:24,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:24,105 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:24,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-21 23:43:24,308 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:24,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-10-21 23:43:24,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:24,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036430355] [2020-10-21 23:43:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:24,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036430355] [2020-10-21 23:43:24,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35689073] [2020-10-21 23:43:24,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:24,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:24,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 23:43:24,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:24,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:24,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:24,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 23:43:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1956219086] [2020-10-21 23:43:24,540 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:24,543 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:24,549 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-10-21 23:43:24,549 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:24,570 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:24,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 23:43:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:24,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 23:43:24,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:24,571 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-10-21 23:43:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:25,250 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-21 23:43:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:43:25,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 23:43:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:25,280 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:25,281 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 23:43:25,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 23:43:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 23:43:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-10-21 23:43:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 23:43:25,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-10-21 23:43:25,288 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-10-21 23:43:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:25,288 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-10-21 23:43:25,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 23:43:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-10-21 23:43:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:25,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:25,289 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:25,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:25,498 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:25,499 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-10-21 23:43:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:25,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784288349] [2020-10-21 23:43:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:25,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784288349] [2020-10-21 23:43:25,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753736541] [2020-10-21 23:43:25,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:25,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 23:43:25,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:25,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:25,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 23:43:25,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534100414] [2020-10-21 23:43:25,736 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:25,738 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:25,742 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-21 23:43:25,743 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:25,804 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:25,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:25,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:25,805 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-10-21 23:43:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:26,446 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 23:43:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:26,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 23:43:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:26,448 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:26,448 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 23:43:26,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 23:43:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 23:43:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-21 23:43:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-21 23:43:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-21 23:43:26,452 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-10-21 23:43:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:26,452 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-21 23:43:26,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-21 23:43:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 23:43:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:26,453 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:26,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 23:43:26,663 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:26,663 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-10-21 23:43:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:26,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538263114] [2020-10-21 23:43:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:26,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538263114] [2020-10-21 23:43:26,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150351982] [2020-10-21 23:43:26,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:26,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:26,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:26,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:26,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:26,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 23:43:26,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1440135769] [2020-10-21 23:43:26,894 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:26,896 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:26,900 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-21 23:43:26,900 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:26,946 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-21 23:43:26,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 23:43:26,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 23:43:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:26,948 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-10-21 23:43:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:27,670 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 23:43:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 23:43:27,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 23:43:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:27,671 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:27,671 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 23:43:27,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 23:43:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 23:43:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 23:43:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 23:43:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 23:43:27,677 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 23:43:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:27,678 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 23:43:27,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 23:43:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 23:43:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 23:43:27,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:27,679 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:27,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:27,889 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:27,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-10-21 23:43:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:27,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724934235] [2020-10-21 23:43:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724934235] [2020-10-21 23:43:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991778418] [2020-10-21 23:43:28,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:28,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 23:43:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:28,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:28,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:28,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:28,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:28,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 23:43:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2003145936] [2020-10-21 23:43:28,143 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:28,145 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:28,150 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-10-21 23:43:28,150 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:28,206 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:28,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:28,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:28,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:28,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:28,207 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 23:43:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:28,861 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 23:43:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:43:28,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-21 23:43:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:28,862 INFO L225 Difference]: With dead ends: 96 [2020-10-21 23:43:28,863 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 23:43:28,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:43:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 23:43:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 23:43:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 23:43:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 23:43:28,867 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 23:43:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:28,867 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 23:43:28,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 23:43:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:28,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:28,868 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:29,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-21 23:43:29,076 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-10-21 23:43:29,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:29,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774540714] [2020-10-21 23:43:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774540714] [2020-10-21 23:43:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249293205] [2020-10-21 23:43:29,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:29,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 23:43:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:29,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:29,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:29,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:29,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 23:43:29,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1368774468] [2020-10-21 23:43:29,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:29,471 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:29,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-10-21 23:43:29,479 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:29,483 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:29,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:29,620 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:29,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:29,621 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-10-21 23:43:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:30,163 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 23:43:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 23:43:30,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 23:43:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:30,165 INFO L225 Difference]: With dead ends: 96 [2020-10-21 23:43:30,165 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 23:43:30,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:43:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 23:43:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 23:43:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 23:43:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-21 23:43:30,172 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-10-21 23:43:30,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:30,173 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-21 23:43:30,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-21 23:43:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:30,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:30,174 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:30,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:30,375 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-10-21 23:43:30,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:30,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527124466] [2020-10-21 23:43:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:30,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527124466] [2020-10-21 23:43:30,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127185376] [2020-10-21 23:43:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:30,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 23:43:30,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:30,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:30,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 23:43:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1518326205] [2020-10-21 23:43:30,614 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:30,617 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:30,620 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-10-21 23:43:30,621 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:30,637 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:30,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 23:43:30,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:30,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 23:43:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:30,638 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-10-21 23:43:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:31,385 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-21 23:43:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:43:31,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 23:43:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:31,387 INFO L225 Difference]: With dead ends: 114 [2020-10-21 23:43:31,387 INFO L226 Difference]: Without dead ends: 109 [2020-10-21 23:43:31,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 23:43:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-21 23:43:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-21 23:43:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-21 23:43:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-10-21 23:43:31,393 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-10-21 23:43:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:31,393 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-10-21 23:43:31,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 23:43:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-10-21 23:43:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:31,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:31,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:31,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-21 23:43:31,603 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-10-21 23:43:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:31,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495100379] [2020-10-21 23:43:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495100379] [2020-10-21 23:43:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925028188] [2020-10-21 23:43:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:31,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:31,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:31,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:31,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 23:43:31,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [623896968] [2020-10-21 23:43:31,863 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:31,866 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:31,869 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-21 23:43:31,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:31,952 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:31,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:31,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:31,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:43:31,953 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-10-21 23:43:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:32,871 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 23:43:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 23:43:32,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 23:43:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:32,873 INFO L225 Difference]: With dead ends: 122 [2020-10-21 23:43:32,873 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 23:43:32,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-10-21 23:43:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 23:43:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-10-21 23:43:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 23:43:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-21 23:43:32,880 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-10-21 23:43:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:32,880 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-21 23:43:32,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-21 23:43:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 23:43:32,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:32,882 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:33,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:33,095 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-10-21 23:43:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:33,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112538746] [2020-10-21 23:43:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:33,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112538746] [2020-10-21 23:43:33,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591967603] [2020-10-21 23:43:33,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:33,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-21 23:43:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:33,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:33,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:33,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 23:43:33,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487556483] [2020-10-21 23:43:33,463 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:33,465 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:33,470 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-21 23:43:33,470 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:33,510 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:33,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 23:43:33,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:33,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 23:43:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:33,511 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-10-21 23:43:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:34,345 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 23:43:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:43:34,349 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 23:43:34,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:34,350 INFO L225 Difference]: With dead ends: 122 [2020-10-21 23:43:34,350 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 23:43:34,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-10-21 23:43:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 23:43:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 23:43:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 23:43:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 23:43:34,354 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 23:43:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:34,354 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 23:43:34,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 23:43:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 23:43:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 23:43:34,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:34,355 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:34,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-21 23:43:34,556 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-10-21 23:43:34,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:34,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416320285] [2020-10-21 23:43:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416320285] [2020-10-21 23:43:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606457556] [2020-10-21 23:43:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:34,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:34,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:34,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:34,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:34,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 23:43:34,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1932649711] [2020-10-21 23:43:34,876 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:34,898 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:34,903 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-10-21 23:43:34,903 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:34,962 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:34,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:43:34,963 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 23:43:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:35,769 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 23:43:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:43:35,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-21 23:43:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:35,774 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:35,775 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 23:43:35,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 23:43:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 23:43:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 23:43:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 23:43:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 23:43:35,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 23:43:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:35,779 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 23:43:35,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 23:43:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:35,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:35,780 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:35,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 23:43:35,990 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:35,990 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-10-21 23:43:35,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:35,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411744108] [2020-10-21 23:43:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:36,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411744108] [2020-10-21 23:43:36,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233543106] [2020-10-21 23:43:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:36,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 23:43:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 23:43:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:36,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:36,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:36,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 23:43:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [708282300] [2020-10-21 23:43:36,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:36,343 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:36,352 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-10-21 23:43:36,352 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:36,363 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:36,363 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:36,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:36,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:36,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:36,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:36,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:36,485 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-10-21 23:43:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:36,947 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 23:43:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:36,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 23:43:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:36,949 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:36,949 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 23:43:36,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 23:43:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 23:43:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-21 23:43:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 23:43:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-21 23:43:36,953 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-10-21 23:43:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:36,954 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-21 23:43:36,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-21 23:43:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:36,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:36,954 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:37,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 23:43:37,165 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-10-21 23:43:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40527938] [2020-10-21 23:43:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:37,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40527938] [2020-10-21 23:43:37,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170558195] [2020-10-21 23:43:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:37,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 23:43:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:43:37,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:37,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:37,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:37,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 23:43:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739053382] [2020-10-21 23:43:37,484 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:37,486 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:37,492 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-10-21 23:43:37,493 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:37,514 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:37,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 23:43:37,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 23:43:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:37,515 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-10-21 23:43:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:38,370 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-21 23:43:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 23:43:38,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 23:43:38,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:38,372 INFO L225 Difference]: With dead ends: 124 [2020-10-21 23:43:38,372 INFO L226 Difference]: Without dead ends: 119 [2020-10-21 23:43:38,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 23:43:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-21 23:43:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-10-21 23:43:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 23:43:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-10-21 23:43:38,376 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-10-21 23:43:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:38,377 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-10-21 23:43:38,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 23:43:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-10-21 23:43:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:38,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:38,378 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:38,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 23:43:38,583 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-10-21 23:43:38,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:38,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762482250] [2020-10-21 23:43:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:38,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762482250] [2020-10-21 23:43:38,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287869222] [2020-10-21 23:43:38,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:43:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:38,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:38,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:38,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 23:43:38,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1050246600] [2020-10-21 23:43:38,862 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:38,865 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:38,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-21 23:43:38,872 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:38,934 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:38,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:38,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:38,935 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-10-21 23:43:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:39,858 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 23:43:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:43:39,858 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 23:43:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:39,860 INFO L225 Difference]: With dead ends: 132 [2020-10-21 23:43:39,860 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 23:43:39,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-10-21 23:43:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 23:43:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-21 23:43:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-21 23:43:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-21 23:43:39,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-10-21 23:43:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:39,865 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-21 23:43:39,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-21 23:43:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 23:43:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:39,866 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:40,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 23:43:40,076 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-10-21 23:43:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388805834] [2020-10-21 23:43:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388805834] [2020-10-21 23:43:40,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041107529] [2020-10-21 23:43:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:40,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 23:43:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:40,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:40,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 23:43:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [552003851] [2020-10-21 23:43:40,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:40,350 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:40,356 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-21 23:43:40,357 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:40,394 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:40,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 23:43:40,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:40,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 23:43:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:40,396 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-10-21 23:43:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:41,376 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 23:43:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 23:43:41,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 23:43:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:41,378 INFO L225 Difference]: With dead ends: 132 [2020-10-21 23:43:41,378 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 23:43:41,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-10-21 23:43:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 23:43:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 23:43:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 23:43:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 23:43:41,383 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 23:43:41,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:41,383 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 23:43:41,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 23:43:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 23:43:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 23:43:41,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:41,384 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:41,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 23:43:41,595 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-10-21 23:43:41,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:41,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129728648] [2020-10-21 23:43:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:41,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129728648] [2020-10-21 23:43:41,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540864022] [2020-10-21 23:43:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:41,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 23:43:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 23:43:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:41,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:41,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:41,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 23:43:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1786032623] [2020-10-21 23:43:41,906 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:41,909 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:41,915 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-10-21 23:43:41,915 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:41,960 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:41,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:41,961 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 23:43:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:42,924 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 23:43:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 23:43:42,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-21 23:43:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:42,926 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:42,927 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 23:43:42,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 23:43:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 23:43:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 23:43:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 23:43:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 23:43:42,932 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 23:43:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:42,932 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 23:43:42,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 23:43:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:42,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:42,933 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:43,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 23:43:43,144 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-10-21 23:43:43,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:43,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719973337] [2020-10-21 23:43:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719973337] [2020-10-21 23:43:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123858113] [2020-10-21 23:43:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:43,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:43,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:43,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:43,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 23:43:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1663040904] [2020-10-21 23:43:43,508 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:43,511 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:43,518 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-10-21 23:43:43,518 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:43,551 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:43,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:43,580 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:43,580 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:43,595 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:43,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:43,611 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:43,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:43,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:43,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:43,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:43,612 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-10-21 23:43:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:44,142 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 23:43:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 23:43:44,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 23:43:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:44,143 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:44,143 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 23:43:44,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:43:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 23:43:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-10-21 23:43:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 23:43:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-21 23:43:44,148 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-10-21 23:43:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:44,148 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-21 23:43:44,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-21 23:43:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:44,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:44,149 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:44,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:44,359 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:44,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:44,360 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-10-21 23:43:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:44,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765897340] [2020-10-21 23:43:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:44,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765897340] [2020-10-21 23:43:44,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947142245] [2020-10-21 23:43:44,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:44,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 23:43:44,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:43:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:44,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:44,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:44,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 23:43:44,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [814243798] [2020-10-21 23:43:44,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:44,704 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:44,708 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-10-21 23:43:44,708 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:44,736 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:44,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 23:43:44,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 23:43:44,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:44,737 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-10-21 23:43:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:45,779 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-21 23:43:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 23:43:45,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 23:43:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:45,781 INFO L225 Difference]: With dead ends: 134 [2020-10-21 23:43:45,781 INFO L226 Difference]: Without dead ends: 129 [2020-10-21 23:43:45,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 23:43:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-21 23:43:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-10-21 23:43:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 23:43:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-10-21 23:43:45,786 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-10-21 23:43:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:45,786 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-10-21 23:43:45,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 23:43:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-10-21 23:43:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:45,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:45,787 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:45,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:45,991 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-10-21 23:43:45,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:45,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134303837] [2020-10-21 23:43:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:46,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134303837] [2020-10-21 23:43:46,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260518465] [2020-10-21 23:43:46,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:46,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 23:43:46,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:46,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:43:46,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:46,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:46,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:46,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 23:43:46,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [800782844] [2020-10-21 23:43:46,404 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:46,409 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:46,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-21 23:43:46,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:46,515 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:46,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:46,516 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-10-21 23:43:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:47,662 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 23:43:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 23:43:47,663 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 23:43:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:47,664 INFO L225 Difference]: With dead ends: 142 [2020-10-21 23:43:47,664 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 23:43:47,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-10-21 23:43:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 23:43:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-10-21 23:43:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-21 23:43:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-21 23:43:47,670 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-10-21 23:43:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:47,671 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-21 23:43:47,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-21 23:43:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 23:43:47,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:47,672 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:47,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:47,873 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-10-21 23:43:47,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:47,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409142530] [2020-10-21 23:43:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:48,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409142530] [2020-10-21 23:43:48,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781973011] [2020-10-21 23:43:48,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:48,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:48,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:48,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 23:43:48,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1650455788] [2020-10-21 23:43:48,243 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:48,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:48,251 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-21 23:43:48,251 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:48,292 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:48,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 23:43:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 23:43:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:48,293 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-10-21 23:43:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:49,460 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 23:43:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 23:43:49,461 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 23:43:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:49,462 INFO L225 Difference]: With dead ends: 142 [2020-10-21 23:43:49,462 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 23:43:49,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-10-21 23:43:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 23:43:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 23:43:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 23:43:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 23:43:49,466 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 23:43:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:49,466 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 23:43:49,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 23:43:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 23:43:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 23:43:49,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:49,467 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:49,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-21 23:43:49,676 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-10-21 23:43:49,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:49,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725060384] [2020-10-21 23:43:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:49,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725060384] [2020-10-21 23:43:49,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725841723] [2020-10-21 23:43:49,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:49,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:50,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:50,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:50,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 23:43:50,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [494685928] [2020-10-21 23:43:50,045 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:50,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:50,053 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-10-21 23:43:50,053 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:50,108 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:50,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:50,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:50,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:50,109 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 23:43:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:51,262 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 23:43:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 23:43:51,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-21 23:43:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:51,264 INFO L225 Difference]: With dead ends: 120 [2020-10-21 23:43:51,264 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 23:43:51,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 23:43:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 23:43:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 23:43:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 23:43:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 23:43:51,270 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 23:43:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:51,270 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 23:43:51,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 23:43:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:51,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:51,271 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:51,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:51,479 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-10-21 23:43:51,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:51,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153065196] [2020-10-21 23:43:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:51,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153065196] [2020-10-21 23:43:51,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572326383] [2020-10-21 23:43:51,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:51,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 23:43:51,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 23:43:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:51,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:51,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:51,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 23:43:51,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [27250820] [2020-10-21 23:43:51,928 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:51,931 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:51,939 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-10-21 23:43:51,939 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:51,972 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:51,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:52,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (<= ~i~0 26))] [2020-10-21 23:43:52,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 23:43:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 23:43:52,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:52,056 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-10-21 23:43:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:52,690 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 23:43:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:52,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 23:43:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:52,692 INFO L225 Difference]: With dead ends: 120 [2020-10-21 23:43:52,692 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 23:43:52,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-10-21 23:43:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 23:43:52,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-21 23:43:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 23:43:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-21 23:43:52,696 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-10-21 23:43:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:52,696 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-21 23:43:52,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 23:43:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-21 23:43:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:52,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:52,697 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:52,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:52,909 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-10-21 23:43:52,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:52,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421545048] [2020-10-21 23:43:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:53,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421545048] [2020-10-21 23:43:53,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146165803] [2020-10-21 23:43:53,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:53,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:53,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:53,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 23:43:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:53,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:53,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:53,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 23:43:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313227744] [2020-10-21 23:43:53,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:53,270 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:53,276 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-10-21 23:43:53,276 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:53,293 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:53,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 23:43:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 23:43:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:53,294 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-10-21 23:43:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:54,539 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-21 23:43:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 23:43:54,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 23:43:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:54,541 INFO L225 Difference]: With dead ends: 144 [2020-10-21 23:43:54,541 INFO L226 Difference]: Without dead ends: 139 [2020-10-21 23:43:54,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 23:43:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-21 23:43:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-10-21 23:43:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-21 23:43:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-21 23:43:54,544 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-10-21 23:43:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-21 23:43:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 23:43:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-21 23:43:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:54,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:54,545 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:54,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 23:43:54,746 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-10-21 23:43:54,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:54,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936159867] [2020-10-21 23:43:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936159867] [2020-10-21 23:43:54,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368921823] [2020-10-21 23:43:54,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:55,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 23:43:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 23:43:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:55,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:55,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:55,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 23:43:55,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1237720205] [2020-10-21 23:43:55,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:55,103 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:55,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-21 23:43:55,109 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:55,182 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:55,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 23:43:55,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 23:43:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:43:55,184 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-10-21 23:43:56,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:56,463 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-21 23:43:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 23:43:56,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 23:43:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:56,465 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:43:56,465 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 23:43:56,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-10-21 23:43:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 23:43:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-10-21 23:43:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 23:43:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-21 23:43:56,470 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-10-21 23:43:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:56,470 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-21 23:43:56,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 23:43:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-21 23:43:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 23:43:56,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:56,471 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:56,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 23:43:56,683 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:56,683 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-10-21 23:43:56,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:56,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626893432] [2020-10-21 23:43:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626893432] [2020-10-21 23:43:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433470137] [2020-10-21 23:43:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:56,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-21 23:43:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:56,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:56,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:56,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 23:43:56,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-10-21 23:43:56,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809168508] [2020-10-21 23:43:56,944 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:56,948 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:56,959 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-21 23:43:56,959 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:56,976 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:56,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:56,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:56,978 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 13 states. [2020-10-21 23:43:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:57,015 INFO L93 Difference]: Finished difference Result 414 states and 998 transitions. [2020-10-21 23:43:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:43:57,015 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 23:43:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:57,016 INFO L225 Difference]: With dead ends: 414 [2020-10-21 23:43:57,016 INFO L226 Difference]: Without dead ends: 46 [2020-10-21 23:43:57,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-21 23:43:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-21 23:43:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 23:43:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-10-21 23:43:57,018 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 29 [2020-10-21 23:43:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:57,018 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-10-21 23:43:57,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-10-21 23:43:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 23:43:57,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:57,019 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:57,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 23:43:57,226 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-10-21 23:43:57,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:57,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352434411] [2020-10-21 23:43:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:57,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352434411] [2020-10-21 23:43:57,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923245819] [2020-10-21 23:43:57,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:57,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:57,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-21 23:43:57,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-21 23:43:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1253574658] [2020-10-21 23:43:57,425 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:57,429 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:57,437 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-21 23:43:57,437 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:57,494 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:57,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:57,495 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-10-21 23:43:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:57,523 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-21 23:43:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:43:57,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-21 23:43:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:57,525 INFO L225 Difference]: With dead ends: 151 [2020-10-21 23:43:57,525 INFO L226 Difference]: Without dead ends: 0 [2020-10-21 23:43:57,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-21 23:43:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-21 23:43:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-21 23:43:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-21 23:43:57,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-21 23:43:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:57,526 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-21 23:43:57,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-21 23:43:57,526 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-21 23:43:57,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:57,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 11:43:57 BasicIcfg [2020-10-21 23:43:57,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 23:43:57,733 INFO L168 Benchmark]: Toolchain (without parser) took 56275.89 ms. Allocated memory was 138.4 MB in the beginning and 523.8 MB in the end (delta: 385.4 MB). Free memory was 99.4 MB in the beginning and 171.6 MB in the end (delta: -72.1 MB). Peak memory consumption was 313.2 MB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,733 INFO L168 Benchmark]: CDTParser took 2.57 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 902.76 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 98.6 MB in the beginning and 157.1 MB in the end (delta: -58.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.07 ms. Allocated memory is still 201.9 MB. Free memory was 157.1 MB in the beginning and 155.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,734 INFO L168 Benchmark]: Boogie Preprocessor took 52.89 ms. Allocated memory is still 201.9 MB. Free memory was 155.1 MB in the beginning and 154.2 MB in the end (delta: 987.0 kB). Peak memory consumption was 987.0 kB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,735 INFO L168 Benchmark]: RCFGBuilder took 454.26 ms. Allocated memory is still 201.9 MB. Free memory was 153.2 MB in the beginning and 132.1 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,735 INFO L168 Benchmark]: TraceAbstraction took 54768.02 ms. Allocated memory was 201.9 MB in the beginning and 523.8 MB in the end (delta: 321.9 MB). Free memory was 131.1 MB in the beginning and 171.6 MB in the end (delta: -40.4 MB). Peak memory consumption was 281.5 MB. Max. memory is 7.1 GB. [2020-10-21 23:43:57,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.57 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 902.76 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 98.6 MB in the beginning and 157.1 MB in the end (delta: -58.5 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 88.07 ms. Allocated memory is still 201.9 MB. Free memory was 157.1 MB in the beginning and 155.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.89 ms. Allocated memory is still 201.9 MB. Free memory was 155.1 MB in the beginning and 154.2 MB in the end (delta: 987.0 kB). Peak memory consumption was 987.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 454.26 ms. Allocated memory is still 201.9 MB. Free memory was 153.2 MB in the beginning and 132.1 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 54768.02 ms. Allocated memory was 201.9 MB in the beginning and 523.8 MB in the end (delta: 321.9 MB). Free memory was 131.1 MB in the beginning and 171.6 MB in the end (delta: -40.4 MB). Peak memory consumption was 281.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 638 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 54.6s, OverallIterations: 51, TraceHistogramMax: 11, AutomataDifference: 26.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 786 SDtfs, 3016 SDslu, 3698 SDs, 0 SdLazy, 3934 SolverSat, 2667 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2798 GetRequests, 1080 SyntacticMatches, 40 SemanticMatches, 1678 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17792 ImplicationChecksByTransitivity, 26.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 51 MinimizatonAttempts, 1280 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 1914 NumberOfCodeBlocks, 1914 NumberOfCodeBlocksAsserted, 236 NumberOfCheckSat, 1816 ConstructedInterpolants, 0 QuantifiedInterpolants, 149786 SizeOfPredicates, 531 NumberOfNonLiveVariables, 6486 ConjunctsInSsa, 738 ConjunctsInUnsatCore, 98 InterpolantComputations, 6 PerfectInterpolantSequences, 362/3520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...