/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 13:41:08,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:41:08,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:41:08,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:41:08,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:41:08,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:41:08,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:41:08,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:41:08,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:41:08,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:41:08,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:41:08,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:41:08,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:41:08,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:41:08,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:41:08,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:41:08,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:41:08,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:41:08,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:41:08,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:41:08,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:41:08,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:41:09,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:41:09,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:41:09,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-15 13:41:09,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-15 13:41:09,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-15 13:41:09,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-15 13:41:09,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-15 13:41:09,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-15 13:41:09,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:41:09,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:41:09,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:41:09,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:41:09,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:41:09,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:41:09,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:41:09,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:41:09,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:41:09,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:41:09,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:41:09,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-15 13:41:09,053 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:41:09,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:41:09,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:41:09,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:41:09,056 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:41:09,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:41:09,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:41:09,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:41:09,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:41:09,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:41:09,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:41:09,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:41:09,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:41:09,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:41:09,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:41:09,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:41:09,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:41:09,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:41:09,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:41:09,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:41:09,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:41:09,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:41:09,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:41:09,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:41:09,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:41:09,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:41:09,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:41:09,061 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-15 13:41:09,061 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:41:09,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:41:09,061 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-15 13:41:09,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:41:09,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:41:09,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:41:09,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:41:09,598 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:41:09,599 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-15 13:41:09,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3231b492d/56e0c77de21f4252a0ecb6fa5b15b5f1/FLAG29cc0f5a6 [2020-09-15 13:41:10,340 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:41:10,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-15 13:41:10,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3231b492d/56e0c77de21f4252a0ecb6fa5b15b5f1/FLAG29cc0f5a6 [2020-09-15 13:41:10,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3231b492d/56e0c77de21f4252a0ecb6fa5b15b5f1 [2020-09-15 13:41:10,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:41:10,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:41:10,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:41:10,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:41:10,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:41:10,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:41:10" (1/1) ... [2020-09-15 13:41:10,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eca95a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:10, skipping insertion in model container [2020-09-15 13:41:10,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:41:10" (1/1) ... [2020-09-15 13:41:10,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:41:10,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:41:11,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:41:11,321 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:41:11,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:41:11,448 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:41:11,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11 WrapperNode [2020-09-15 13:41:11,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:41:11,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:41:11,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:41:11,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:41:11,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:41:11,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:41:11,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:41:11,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:41:11,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... [2020-09-15 13:41:11,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:41:11,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:41:11,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:41:11,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:41:11,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:41:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 13:41:11,644 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 13:41:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 13:41:11,645 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 13:41:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:41:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 13:41:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:41:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:41:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 13:41:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:41:11,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:41:11,649 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:41:12,036 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:41:12,036 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 13:41:12,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:41:12 BoogieIcfgContainer [2020-09-15 13:41:12,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:41:12,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:41:12,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:41:12,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:41:12,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:41:10" (1/3) ... [2020-09-15 13:41:12,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ec073f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:41:12, skipping insertion in model container [2020-09-15 13:41:12,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:41:11" (2/3) ... [2020-09-15 13:41:12,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ec073f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:41:12, skipping insertion in model container [2020-09-15 13:41:12,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:41:12" (3/3) ... [2020-09-15 13:41:12,053 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-15 13:41:12,065 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:41:12,066 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:41:12,078 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:41:12,079 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:41:12,109 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,110 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,110 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,111 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,111 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,112 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,112 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,112 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,113 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,113 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,113 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,114 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,114 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,114 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,115 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,115 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,115 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,116 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,117 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,117 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,117 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,118 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,118 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,118 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,119 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,119 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,119 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,124 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,124 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,125 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,125 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,125 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,125 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,134 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,134 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,135 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,135 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,135 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:41:12,158 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 13:41:12,183 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:41:12,183 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:41:12,183 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:41:12,183 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-15 13:41:12,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:41:12,184 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:41:12,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:41:12,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:41:12,202 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-15 13:41:12,204 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:41:12,249 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:41:12,250 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:41:12,258 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 13:41:12,261 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-15 13:41:12,300 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-15 13:41:12,301 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 13:41:12,302 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-15 13:41:12,304 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-15 13:41:12,309 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:41:13,429 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-15 13:41:13,709 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-15 13:41:13,709 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-15 13:41:13,716 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 13:41:13,733 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 13:41:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 13:41:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 13:41:13,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:13,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 13:41:13,751 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-15 13:41:13,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:13,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785080713] [2020-09-15 13:41:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:14,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785080713] [2020-09-15 13:41:14,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:41:14,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 13:41:14,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [767979080] [2020-09-15 13:41:14,151 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:14,156 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:14,178 INFO L274 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-09-15 13:41:14,178 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:14,182 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:41:14,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 13:41:14,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 13:41:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 13:41:14,210 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 13:41:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:14,291 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-15 13:41:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 13:41:14,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 13:41:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:14,312 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:41:14,312 INFO L226 Difference]: Without dead ends: 42 [2020-09-15 13:41:14,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:41:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-15 13:41:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-15 13:41:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:41:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-15 13:41:14,374 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-15 13:41:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:14,374 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-15 13:41:14,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 13:41:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-15 13:41:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:41:14,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:14,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:14,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:41:14,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-15 13:41:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647830204] [2020-09-15 13:41:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:14,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647830204] [2020-09-15 13:41:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:41:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:41:14,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117435695] [2020-09-15 13:41:14,494 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:14,495 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:14,499 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-15 13:41:14,499 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:14,530 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-15 13:41:14,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 13:41:14,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 13:41:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:41:14,533 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-15 13:41:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:14,574 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-15 13:41:14,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-15 13:41:14,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 13:41:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:14,577 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:41:14,577 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:41:14,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:41:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:41:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:41:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:41:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-15 13:41:14,588 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-15 13:41:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:14,590 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-15 13:41:14,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 13:41:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-15 13:41:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 13:41:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:14,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:14,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 13:41:14,592 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-15 13:41:14,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:14,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437578261] [2020-09-15 13:41:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:14,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437578261] [2020-09-15 13:41:14,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:41:14,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 13:41:14,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1019253421] [2020-09-15 13:41:14,728 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:14,729 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:14,733 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-09-15 13:41:14,733 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:14,743 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:14,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:14,792 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [466#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:14,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-15 13:41:14,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-15 13:41:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-15 13:41:14,793 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-09-15 13:41:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:14,967 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-09-15 13:41:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 13:41:14,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-09-15 13:41:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:14,970 INFO L225 Difference]: With dead ends: 62 [2020-09-15 13:41:14,970 INFO L226 Difference]: Without dead ends: 44 [2020-09-15 13:41:14,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:41:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-15 13:41:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-15 13:41:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-15 13:41:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-15 13:41:14,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-09-15 13:41:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:14,988 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-15 13:41:14,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-15 13:41:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-15 13:41:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:41:14,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:14,991 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:14,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 13:41:14,991 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:14,992 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 2 times [2020-09-15 13:41:14,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:14,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272197942] [2020-09-15 13:41:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:15,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272197942] [2020-09-15 13:41:15,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951291723] [2020-09-15 13:41:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:15,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:41:15,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:15,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:15,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:41:15,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [458737191] [2020-09-15 13:41:15,268 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:15,269 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:15,272 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-09-15 13:41:15,273 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:15,275 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,276 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,319 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,319 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,338 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,339 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,363 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,364 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,376 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,376 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,393 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,394 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,418 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,419 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,434 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:15,435 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:15,448 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [644#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-15 13:41:15,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:41:15,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:41:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:41:15,449 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 8 states. [2020-09-15 13:41:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:15,645 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-09-15 13:41:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:41:15,646 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:41:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:15,647 INFO L225 Difference]: With dead ends: 56 [2020-09-15 13:41:15,647 INFO L226 Difference]: Without dead ends: 50 [2020-09-15 13:41:15,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:41:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-15 13:41:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-15 13:41:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:41:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 104 transitions. [2020-09-15 13:41:15,657 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 104 transitions. Word has length 11 [2020-09-15 13:41:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:15,657 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 104 transitions. [2020-09-15 13:41:15,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:41:15,657 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 104 transitions. [2020-09-15 13:41:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:41:15,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:15,658 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:15,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:15,860 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 3 times [2020-09-15 13:41:15,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:15,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104779676] [2020-09-15 13:41:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:16,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104779676] [2020-09-15 13:41:16,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263377105] [2020-09-15 13:41:16,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 13:41:16,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:41:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:16,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:16,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-15 13:41:16,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1186531824] [2020-09-15 13:41:16,108 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:16,109 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:16,111 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-09-15 13:41:16,112 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:16,114 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:16,115 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:16,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:16,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:16,191 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [832#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-15 13:41:16,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-15 13:41:16,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-15 13:41:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-15 13:41:16,193 INFO L87 Difference]: Start difference. First operand 42 states and 104 transitions. Second operand 8 states. [2020-09-15 13:41:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:16,439 INFO L93 Difference]: Finished difference Result 66 states and 159 transitions. [2020-09-15 13:41:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:41:16,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-15 13:41:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:16,444 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:41:16,444 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:41:16,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:41:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:41:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-09-15 13:41:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:41:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-09-15 13:41:16,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-09-15 13:41:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:16,453 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-09-15 13:41:16,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-15 13:41:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-09-15 13:41:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:41:16,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:16,455 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:16,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:16,671 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 4 times [2020-09-15 13:41:16,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:16,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576290240] [2020-09-15 13:41:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:16,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576290240] [2020-09-15 13:41:16,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144000357] [2020-09-15 13:41:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:16,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:41:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:41:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:16,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:16,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:41:16,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437199252] [2020-09-15 13:41:16,884 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:16,885 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:16,887 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-09-15 13:41:16,887 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:16,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:16,894 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:16,969 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:16,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:17,007 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1034#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:17,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:41:17,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:41:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:17,009 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-09-15 13:41:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:17,251 INFO L93 Difference]: Finished difference Result 64 states and 149 transitions. [2020-09-15 13:41:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:41:17,253 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:41:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:17,255 INFO L225 Difference]: With dead ends: 64 [2020-09-15 13:41:17,255 INFO L226 Difference]: Without dead ends: 58 [2020-09-15 13:41:17,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-15 13:41:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-15 13:41:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-15 13:41:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-15 13:41:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 112 transitions. [2020-09-15 13:41:17,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 112 transitions. Word has length 12 [2020-09-15 13:41:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:17,263 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 112 transitions. [2020-09-15 13:41:17,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:41:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 112 transitions. [2020-09-15 13:41:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 13:41:17,264 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:17,264 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:17,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:17,481 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 5 times [2020-09-15 13:41:17,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:17,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443441914] [2020-09-15 13:41:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:17,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443441914] [2020-09-15 13:41:17,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647891257] [2020-09-15 13:41:17,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:17,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:17,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:17,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:41:17,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:17,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:17,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-15 13:41:17,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2080539955] [2020-09-15 13:41:17,742 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:17,744 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:17,751 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-15 13:41:17,751 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:17,759 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:17,759 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:17,852 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:17,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:17,896 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1244#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-15 13:41:17,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:41:17,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:17,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:41:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:41:17,899 INFO L87 Difference]: Start difference. First operand 45 states and 112 transitions. Second operand 9 states. [2020-09-15 13:41:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:18,236 INFO L93 Difference]: Finished difference Result 63 states and 155 transitions. [2020-09-15 13:41:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 13:41:18,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-15 13:41:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:18,238 INFO L225 Difference]: With dead ends: 63 [2020-09-15 13:41:18,238 INFO L226 Difference]: Without dead ends: 51 [2020-09-15 13:41:18,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:41:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-15 13:41:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2020-09-15 13:41:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-15 13:41:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-15 13:41:18,253 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 12 [2020-09-15 13:41:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:18,254 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-15 13:41:18,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:41:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-15 13:41:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:41:18,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:18,255 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:18,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:18,474 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 6 times [2020-09-15 13:41:18,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:18,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029589497] [2020-09-15 13:41:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:18,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029589497] [2020-09-15 13:41:18,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241505530] [2020-09-15 13:41:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:18,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 13:41:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:41:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:18,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:18,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:41:18,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [674721617] [2020-09-15 13:41:18,679 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:18,680 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:18,684 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-09-15 13:41:18,684 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:18,686 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,686 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,714 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,714 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,742 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,754 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,755 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,765 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,773 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,773 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,795 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,795 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,805 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:18,805 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:18,816 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1447#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-15 13:41:18,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:41:18,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:18,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:41:18,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:41:18,818 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 10 states. [2020-09-15 13:41:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:19,023 INFO L93 Difference]: Finished difference Result 60 states and 140 transitions. [2020-09-15 13:41:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:41:19,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:41:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:19,026 INFO L225 Difference]: With dead ends: 60 [2020-09-15 13:41:19,027 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:41:19,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:41:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:41:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-15 13:41:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:41:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:41:19,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 13 [2020-09-15 13:41:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:19,060 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:41:19,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:41:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:41:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:41:19,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:19,062 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:19,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:19,263 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 7 times [2020-09-15 13:41:19,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:19,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915936388] [2020-09-15 13:41:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:19,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915936388] [2020-09-15 13:41:19,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023809572] [2020-09-15 13:41:19,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:19,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:41:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:19,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:19,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:41:19,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [96842959] [2020-09-15 13:41:19,448 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:19,449 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:19,452 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:41:19,452 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:19,456 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:19,457 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:19,492 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:19,492 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:19,504 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1659#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-15 13:41:19,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:41:19,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:41:19,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:41:19,506 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-09-15 13:41:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:19,836 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-15 13:41:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:41:19,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:41:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:19,838 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:41:19,838 INFO L226 Difference]: Without dead ends: 68 [2020-09-15 13:41:19,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:41:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-15 13:41:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-15 13:41:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-15 13:41:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 120 transitions. [2020-09-15 13:41:19,844 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 120 transitions. Word has length 13 [2020-09-15 13:41:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:19,844 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 120 transitions. [2020-09-15 13:41:19,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:41:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 120 transitions. [2020-09-15 13:41:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 13:41:19,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:19,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:20,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:20,047 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:20,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:20,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 8 times [2020-09-15 13:41:20,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:20,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108065084] [2020-09-15 13:41:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:20,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108065084] [2020-09-15 13:41:20,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363493900] [2020-09-15 13:41:20,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:20,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:41:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:20,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-15 13:41:20,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423642103] [2020-09-15 13:41:20,229 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:20,230 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:20,232 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-09-15 13:41:20,233 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:20,236 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:20,236 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:20,267 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:20,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:20,279 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1897#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:20,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 13:41:20,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 13:41:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:41:20,280 INFO L87 Difference]: Start difference. First operand 48 states and 120 transitions. Second operand 10 states. [2020-09-15 13:41:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:20,625 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2020-09-15 13:41:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:41:20,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-15 13:41:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:20,629 INFO L225 Difference]: With dead ends: 74 [2020-09-15 13:41:20,629 INFO L226 Difference]: Without dead ends: 62 [2020-09-15 13:41:20,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:41:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-15 13:41:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-09-15 13:41:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:41:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-15 13:41:20,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2020-09-15 13:41:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:20,652 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-15 13:41:20,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 13:41:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-15 13:41:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:41:20,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:20,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:20,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-15 13:41:20,871 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 9 times [2020-09-15 13:41:20,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:20,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063181485] [2020-09-15 13:41:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:21,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063181485] [2020-09-15 13:41:21,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182938284] [2020-09-15 13:41:21,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:21,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:41:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:21,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:41:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:21,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:21,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:41:21,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [511023765] [2020-09-15 13:41:21,114 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:21,116 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:21,118 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-09-15 13:41:21,119 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:21,126 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:21,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:21,175 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:21,175 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:21,192 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2131#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:21,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:41:21,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:41:21,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:41:21,194 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 11 states. [2020-09-15 13:41:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:21,410 INFO L93 Difference]: Finished difference Result 70 states and 162 transitions. [2020-09-15 13:41:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 13:41:21,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:41:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:21,413 INFO L225 Difference]: With dead ends: 70 [2020-09-15 13:41:21,413 INFO L226 Difference]: Without dead ends: 64 [2020-09-15 13:41:21,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:41:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-15 13:41:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-09-15 13:41:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 13:41:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 120 transitions. [2020-09-15 13:41:21,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 120 transitions. Word has length 14 [2020-09-15 13:41:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 120 transitions. [2020-09-15 13:41:21,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:41:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 120 transitions. [2020-09-15 13:41:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:41:21,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:21,427 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:21,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-15 13:41:21,640 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 10 times [2020-09-15 13:41:21,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:21,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242903781] [2020-09-15 13:41:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:21,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242903781] [2020-09-15 13:41:21,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371576846] [2020-09-15 13:41:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:21,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:41:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:41:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:21,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:21,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:41:21,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1614581010] [2020-09-15 13:41:21,828 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:21,830 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:21,832 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:41:21,832 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:21,836 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:21,836 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:21,875 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:21,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:21,888 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2367#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-15 13:41:21,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:41:21,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:41:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:41:21,890 INFO L87 Difference]: Start difference. First operand 49 states and 120 transitions. Second operand 11 states. [2020-09-15 13:41:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:22,202 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-15 13:41:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:41:22,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:41:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:22,203 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:41:22,204 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:41:22,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-15 13:41:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:41:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-09-15 13:41:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-15 13:41:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 128 transitions. [2020-09-15 13:41:22,209 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 128 transitions. Word has length 14 [2020-09-15 13:41:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:22,209 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 128 transitions. [2020-09-15 13:41:22,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:41:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 128 transitions. [2020-09-15 13:41:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:41:22,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:22,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:22,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:22,422 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 11 times [2020-09-15 13:41:22,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:22,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332607329] [2020-09-15 13:41:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:22,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332607329] [2020-09-15 13:41:22,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350595508] [2020-09-15 13:41:22,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:22,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 13:41:22,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:22,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:41:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:22,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:22,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-15 13:41:22,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721747619] [2020-09-15 13:41:22,638 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:22,640 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:22,642 INFO L274 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-09-15 13:41:22,642 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:22,646 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:22,646 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:22,682 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:22,683 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:22,695 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2610#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-15 13:41:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:41:22,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:41:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:41:22,696 INFO L87 Difference]: Start difference. First operand 51 states and 128 transitions. Second operand 11 states. [2020-09-15 13:41:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:23,040 INFO L93 Difference]: Finished difference Result 69 states and 171 transitions. [2020-09-15 13:41:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:41:23,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 13:41:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:23,042 INFO L225 Difference]: With dead ends: 69 [2020-09-15 13:41:23,042 INFO L226 Difference]: Without dead ends: 57 [2020-09-15 13:41:23,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:41:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-15 13:41:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-09-15 13:41:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-15 13:41:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-15 13:41:23,046 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-09-15 13:41:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:23,047 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-15 13:41:23,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:41:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-15 13:41:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:41:23,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:23,048 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:23,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:23,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 12 times [2020-09-15 13:41:23,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:23,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545556260] [2020-09-15 13:41:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:23,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545556260] [2020-09-15 13:41:23,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746081764] [2020-09-15 13:41:23,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:23,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:41:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:41:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:23,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:23,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:41:23,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [522581898] [2020-09-15 13:41:23,466 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:23,468 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:23,471 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-09-15 13:41:23,472 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:23,473 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,474 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,502 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,503 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,520 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,521 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,526 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,537 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,538 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,558 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,559 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,575 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,583 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:23,583 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:23,593 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2843#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-15 13:41:23,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:41:23,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:41:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:41:23,594 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 12 states. [2020-09-15 13:41:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:23,849 INFO L93 Difference]: Finished difference Result 66 states and 154 transitions. [2020-09-15 13:41:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:41:23,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:41:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:23,850 INFO L225 Difference]: With dead ends: 66 [2020-09-15 13:41:23,851 INFO L226 Difference]: Without dead ends: 60 [2020-09-15 13:41:23,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:41:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-15 13:41:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-15 13:41:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:41:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-15 13:41:23,855 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 15 [2020-09-15 13:41:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:23,856 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-15 13:41:23,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:41:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-15 13:41:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:41:23,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:23,857 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:24,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 13:41:24,068 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:24,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 13 times [2020-09-15 13:41:24,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:24,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081498648] [2020-09-15 13:41:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:24,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081498648] [2020-09-15 13:41:24,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321422507] [2020-09-15 13:41:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:41:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:24,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:24,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:41:24,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1281738288] [2020-09-15 13:41:24,341 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:24,343 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:24,346 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:41:24,347 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:24,353 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:24,354 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:24,392 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:24,392 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:24,408 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3081#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-15 13:41:24,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:41:24,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:41:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:41:24,412 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 12 states. [2020-09-15 13:41:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:24,734 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2020-09-15 13:41:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:41:24,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:41:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:24,735 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:41:24,736 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 13:41:24,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:41:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 13:41:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-15 13:41:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-15 13:41:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 128 transitions. [2020-09-15 13:41:24,741 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 128 transitions. Word has length 15 [2020-09-15 13:41:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:24,741 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 128 transitions. [2020-09-15 13:41:24,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:41:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 128 transitions. [2020-09-15 13:41:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:41:24,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:24,742 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:24,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 13:41:24,955 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 14 times [2020-09-15 13:41:24,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:24,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207989184] [2020-09-15 13:41:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:25,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207989184] [2020-09-15 13:41:25,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36814692] [2020-09-15 13:41:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:25,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:41:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:25,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:25,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:41:25,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [83757884] [2020-09-15 13:41:25,151 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:25,153 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:25,157 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:41:25,157 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:25,159 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:25,159 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:25,200 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:25,201 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:25,215 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3347#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:25,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:41:25,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:41:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:41:25,217 INFO L87 Difference]: Start difference. First operand 52 states and 128 transitions. Second operand 12 states. [2020-09-15 13:41:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:25,707 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-15 13:41:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:41:25,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:41:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:25,710 INFO L225 Difference]: With dead ends: 81 [2020-09-15 13:41:25,710 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 13:41:25,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-15 13:41:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 13:41:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-09-15 13:41:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:41:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-09-15 13:41:25,716 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 15 [2020-09-15 13:41:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:25,716 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-09-15 13:41:25,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:41:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-09-15 13:41:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 13:41:25,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:25,718 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:25,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 13:41:25,919 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 15 times [2020-09-15 13:41:25,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:25,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919907352] [2020-09-15 13:41:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:26,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919907352] [2020-09-15 13:41:26,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140955082] [2020-09-15 13:41:26,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:26,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 13:41:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:26,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:41:26,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:26,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:26,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-15 13:41:26,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1286757213] [2020-09-15 13:41:26,153 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:26,154 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:26,157 INFO L274 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-09-15 13:41:26,157 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:26,160 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:26,161 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:26,218 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:26,218 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:26,234 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3620#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-15 13:41:26,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:41:26,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:41:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:41:26,236 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 12 states. [2020-09-15 13:41:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:26,731 INFO L93 Difference]: Finished difference Result 82 states and 199 transitions. [2020-09-15 13:41:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:41:26,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-15 13:41:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:26,732 INFO L225 Difference]: With dead ends: 82 [2020-09-15 13:41:26,732 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 13:41:26,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:41:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 13:41:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-09-15 13:41:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:41:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-15 13:41:26,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2020-09-15 13:41:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:26,737 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-15 13:41:26,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:41:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-15 13:41:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:41:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:26,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:26,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:26,947 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 16 times [2020-09-15 13:41:26,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:26,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895371729] [2020-09-15 13:41:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:27,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895371729] [2020-09-15 13:41:27,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281776777] [2020-09-15 13:41:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:27,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:41:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:41:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:27,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:27,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:41:27,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1109088035] [2020-09-15 13:41:27,187 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:27,188 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:27,192 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-09-15 13:41:27,192 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:27,194 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:27,194 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:27,236 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:27,237 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:27,256 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3886#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:27,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:41:27,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:41:27,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:41:27,258 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 13 states. [2020-09-15 13:41:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:27,574 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-15 13:41:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 13:41:27,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:41:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:27,576 INFO L225 Difference]: With dead ends: 78 [2020-09-15 13:41:27,576 INFO L226 Difference]: Without dead ends: 72 [2020-09-15 13:41:27,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-15 13:41:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-15 13:41:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-15 13:41:27,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-15 13:41:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 130 transitions. [2020-09-15 13:41:27,583 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 130 transitions. Word has length 16 [2020-09-15 13:41:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:27,583 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 130 transitions. [2020-09-15 13:41:27,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:41:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 130 transitions. [2020-09-15 13:41:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:41:27,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:27,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:27,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:41:27,785 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 17 times [2020-09-15 13:41:27,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:27,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484532951] [2020-09-15 13:41:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:27,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484532951] [2020-09-15 13:41:27,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544603886] [2020-09-15 13:41:27,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:28,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 13:41:28,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:41:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:28,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:28,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:41:28,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [665765082] [2020-09-15 13:41:28,022 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:28,024 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:28,027 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:41:28,027 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:28,030 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:28,030 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:28,069 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:28,070 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:28,084 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4150#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-15 13:41:28,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:41:28,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:41:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:41:28,086 INFO L87 Difference]: Start difference. First operand 53 states and 130 transitions. Second operand 13 states. [2020-09-15 13:41:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:28,483 INFO L93 Difference]: Finished difference Result 75 states and 176 transitions. [2020-09-15 13:41:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:41:28,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:41:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:28,484 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:41:28,485 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:41:28,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-15 13:41:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:41:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-15 13:41:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 13:41:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-15 13:41:28,489 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 16 [2020-09-15 13:41:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:28,489 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-15 13:41:28,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:41:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-15 13:41:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:41:28,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:28,490 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:28,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:28,700 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 18 times [2020-09-15 13:41:28,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:28,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791946922] [2020-09-15 13:41:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:28,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791946922] [2020-09-15 13:41:28,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59341723] [2020-09-15 13:41:28,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:28,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 13:41:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:41:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:28,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:28,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:41:28,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059075543] [2020-09-15 13:41:28,942 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:28,944 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:28,948 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:41:28,949 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:28,952 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:28,953 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:29,005 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:29,006 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:29,022 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4419#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-15 13:41:29,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:41:29,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:41:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:41:29,024 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 13 states. [2020-09-15 13:41:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:29,492 INFO L93 Difference]: Finished difference Result 75 states and 179 transitions. [2020-09-15 13:41:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:41:29,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:41:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:29,494 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:41:29,494 INFO L226 Difference]: Without dead ends: 69 [2020-09-15 13:41:29,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-15 13:41:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-15 13:41:29,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2020-09-15 13:41:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-15 13:41:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-09-15 13:41:29,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 16 [2020-09-15 13:41:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:29,503 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-09-15 13:41:29,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:41:29,503 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-09-15 13:41:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:41:29,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:29,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:29,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:29,715 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 19 times [2020-09-15 13:41:29,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:29,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622058099] [2020-09-15 13:41:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:29,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622058099] [2020-09-15 13:41:29,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7998329] [2020-09-15 13:41:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:41:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:29,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:29,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-15 13:41:29,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [660839661] [2020-09-15 13:41:29,904 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:29,905 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:29,909 INFO L274 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-09-15 13:41:29,909 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:29,910 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:29,911 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:29,953 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:29,953 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:29,967 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4696#(and (< ~i~0 16) (<= ~j~0 14))] [2020-09-15 13:41:29,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:41:29,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:41:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:41:29,969 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 13 states. [2020-09-15 13:41:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:30,433 INFO L93 Difference]: Finished difference Result 75 states and 187 transitions. [2020-09-15 13:41:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 13:41:30,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-15 13:41:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:30,435 INFO L225 Difference]: With dead ends: 75 [2020-09-15 13:41:30,435 INFO L226 Difference]: Without dead ends: 63 [2020-09-15 13:41:30,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=594, Unknown=0, NotChecked=0, Total=870 [2020-09-15 13:41:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-15 13:41:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-15 13:41:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-15 13:41:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-15 13:41:30,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2020-09-15 13:41:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:30,440 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-15 13:41:30,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:41:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-15 13:41:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:41:30,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:30,441 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:30,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 13:41:30,652 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 20 times [2020-09-15 13:41:30,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:30,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084271765] [2020-09-15 13:41:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:30,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084271765] [2020-09-15 13:41:30,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136758122] [2020-09-15 13:41:30,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:30,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:41:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:41:30,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:30,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:30,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:41:30,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325390039] [2020-09-15 13:41:30,951 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:30,953 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:30,959 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-15 13:41:30,960 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:30,964 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:30,964 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:30,999 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,000 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,026 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,027 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,036 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,037 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,047 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,048 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,076 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,076 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,103 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,104 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,113 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,113 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,122 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4959#(and (< ~i~0 16) (<= ~j~0 4))] [2020-09-15 13:41:31,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:41:31,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:31,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:41:31,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:41:31,124 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 14 states. [2020-09-15 13:41:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:31,439 INFO L93 Difference]: Finished difference Result 72 states and 168 transitions. [2020-09-15 13:41:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:41:31,440 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:41:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:31,441 INFO L225 Difference]: With dead ends: 72 [2020-09-15 13:41:31,441 INFO L226 Difference]: Without dead ends: 66 [2020-09-15 13:41:31,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:41:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-15 13:41:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-15 13:41:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-15 13:41:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-15 13:41:31,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-09-15 13:41:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:31,447 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-15 13:41:31,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:41:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-15 13:41:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:41:31,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:31,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:31,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:31,661 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 21 times [2020-09-15 13:41:31,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:31,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491814846] [2020-09-15 13:41:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:31,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491814846] [2020-09-15 13:41:31,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554198702] [2020-09-15 13:41:31,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:31,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:41:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:41:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:31,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:31,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:41:31,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2024170417] [2020-09-15 13:41:31,914 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:31,915 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:31,918 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:41:31,919 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:31,920 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,920 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,959 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:31,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:31,981 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5223#(and (< ~i~0 16) (<= ~j~0 6))] [2020-09-15 13:41:31,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:41:31,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:41:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:41:31,983 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-09-15 13:41:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:32,436 INFO L93 Difference]: Finished difference Result 92 states and 210 transitions. [2020-09-15 13:41:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:41:32,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:41:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:32,438 INFO L225 Difference]: With dead ends: 92 [2020-09-15 13:41:32,438 INFO L226 Difference]: Without dead ends: 86 [2020-09-15 13:41:32,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:41:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-15 13:41:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-09-15 13:41:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-15 13:41:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 138 transitions. [2020-09-15 13:41:32,442 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 138 transitions. Word has length 17 [2020-09-15 13:41:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:32,442 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 138 transitions. [2020-09-15 13:41:32,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:41:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 138 transitions. [2020-09-15 13:41:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:41:32,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:32,443 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:32,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-15 13:41:32,653 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:32,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 22 times [2020-09-15 13:41:32,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:32,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946549311] [2020-09-15 13:41:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:32,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946549311] [2020-09-15 13:41:32,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880839987] [2020-09-15 13:41:32,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:32,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:41:32,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:32,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:41:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:32,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:32,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:41:32,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437660143] [2020-09-15 13:41:32,851 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:32,853 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:32,859 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:41:32,860 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:32,863 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:32,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:32,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:32,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:32,903 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5519#(and (< ~i~0 16) (<= ~j~0 8))] [2020-09-15 13:41:32,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:41:32,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:32,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:41:32,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:41:32,904 INFO L87 Difference]: Start difference. First operand 56 states and 138 transitions. Second operand 14 states. [2020-09-15 13:41:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:33,356 INFO L93 Difference]: Finished difference Result 89 states and 206 transitions. [2020-09-15 13:41:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:41:33,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:41:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:33,357 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:41:33,357 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:41:33,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:41:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:41:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2020-09-15 13:41:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-15 13:41:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 144 transitions. [2020-09-15 13:41:33,361 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 144 transitions. Word has length 17 [2020-09-15 13:41:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:33,362 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 144 transitions. [2020-09-15 13:41:33,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:41:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 144 transitions. [2020-09-15 13:41:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:41:33,362 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:33,363 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:33,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 13:41:33,572 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 23 times [2020-09-15 13:41:33,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:33,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424482154] [2020-09-15 13:41:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:33,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424482154] [2020-09-15 13:41:33,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738913102] [2020-09-15 13:41:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:33,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:41:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:41:33,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:33,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:33,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:41:33,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2125028392] [2020-09-15 13:41:33,786 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:33,787 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:33,790 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:41:33,790 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:33,792 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:33,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:33,827 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:33,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:33,843 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5820#(and (< ~i~0 16) (<= ~j~0 10))] [2020-09-15 13:41:33,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:41:33,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:41:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:41:33,845 INFO L87 Difference]: Start difference. First operand 58 states and 144 transitions. Second operand 14 states. [2020-09-15 13:41:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:34,399 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-09-15 13:41:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 13:41:34,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:41:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:34,401 INFO L225 Difference]: With dead ends: 89 [2020-09-15 13:41:34,401 INFO L226 Difference]: Without dead ends: 83 [2020-09-15 13:41:34,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 13:41:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-15 13:41:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-15 13:41:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-15 13:41:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 152 transitions. [2020-09-15 13:41:34,406 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 152 transitions. Word has length 17 [2020-09-15 13:41:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:34,406 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 152 transitions. [2020-09-15 13:41:34,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:41:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 152 transitions. [2020-09-15 13:41:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-15 13:41:34,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:34,407 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:34,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:34,617 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 24 times [2020-09-15 13:41:34,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:34,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826120795] [2020-09-15 13:41:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:41:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:34,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826120795] [2020-09-15 13:41:34,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871540540] [2020-09-15 13:41:34,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:41:34,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-15 13:41:34,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:41:34,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:41:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:41:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:41:34,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:41:34,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-15 13:41:34,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1109238823] [2020-09-15 13:41:34,873 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-15 13:41:34,874 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-15 13:41:34,878 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-09-15 13:41:34,878 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-15 13:41:34,879 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:34,879 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:34,913 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-09-15 13:41:34,913 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-09-15 13:41:34,924 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6129#(and (< ~i~0 16) (<= ~j~0 12))] [2020-09-15 13:41:34,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 13:41:34,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:41:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 13:41:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-15 13:41:34,925 INFO L87 Difference]: Start difference. First operand 60 states and 152 transitions. Second operand 14 states. [2020-09-15 13:41:35,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:41:35,484 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2020-09-15 13:41:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 13:41:35,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-15 13:41:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:41:35,486 INFO L225 Difference]: With dead ends: 90 [2020-09-15 13:41:35,486 INFO L226 Difference]: Without dead ends: 78 [2020-09-15 13:41:35,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 13:41:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-15 13:41:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2020-09-15 13:41:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 13:41:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-15 13:41:35,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-09-15 13:41:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:41:35,490 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-15 13:41:35,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 13:41:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-15 13:41:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-15 13:41:35,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:41:35,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:41:35,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 13:41:35,698 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:41:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:41:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 25 times [2020-09-15 13:41:35,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:41:35,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970126203] [2020-09-15 13:41:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:41:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:41:35,713 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:41:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-15 13:41:35,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-15 13:41:35,754 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-15 13:41:35,754 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-15 13:41:35,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-15 13:41:35,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 01:41:35 BasicIcfg [2020-09-15 13:41:35,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-15 13:41:35,820 INFO L168 Benchmark]: Toolchain (without parser) took 25216.95 ms. Allocated memory was 146.8 MB in the beginning and 382.7 MB in the end (delta: 235.9 MB). Free memory was 101.7 MB in the beginning and 235.1 MB in the end (delta: -133.5 MB). Peak memory consumption was 102.5 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,821 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-15 13:41:35,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 839.78 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 101.0 MB in the beginning and 165.2 MB in the end (delta: -64.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,822 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.17 ms. Allocated memory is still 205.0 MB. Free memory was 165.2 MB in the beginning and 163.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,822 INFO L168 Benchmark]: Boogie Preprocessor took 39.26 ms. Allocated memory is still 205.0 MB. Free memory was 162.5 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,822 INFO L168 Benchmark]: RCFGBuilder took 484.67 ms. Allocated memory is still 205.0 MB. Free memory was 161.2 MB in the beginning and 140.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,823 INFO L168 Benchmark]: TraceAbstraction took 23775.11 ms. Allocated memory was 205.0 MB in the beginning and 382.7 MB in the end (delta: 177.7 MB). Free memory was 140.1 MB in the beginning and 235.1 MB in the end (delta: -95.0 MB). Peak memory consumption was 82.7 MB. Max. memory is 7.1 GB. [2020-09-15 13:41:35,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 839.78 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 101.0 MB in the beginning and 165.2 MB in the end (delta: -64.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 67.17 ms. Allocated memory is still 205.0 MB. Free memory was 165.2 MB in the beginning and 163.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.26 ms. Allocated memory is still 205.0 MB. Free memory was 162.5 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 484.67 ms. Allocated memory is still 205.0 MB. Free memory was 161.2 MB in the beginning and 140.8 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23775.11 ms. Allocated memory was 205.0 MB in the beginning and 382.7 MB in the end (delta: 177.7 MB). Free memory was 140.1 MB in the beginning and 235.1 MB in the end (delta: -95.0 MB). Peak memory consumption was 82.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.5s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 374 SDtfs, 1096 SDslu, 1600 SDs, 0 SdLazy, 1735 SolverSat, 803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1130 GetRequests, 555 SyntacticMatches, 50 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 417 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 714 NumberOfCodeBlocks, 714 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 647 ConstructedInterpolants, 0 QuantifiedInterpolants, 38679 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2232 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 49 InterpolantComputations, 3 PerfectInterpolantSequences, 0/400 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...