/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:51:09,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:51:09,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:51:09,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:51:09,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:51:09,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:51:09,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:51:10,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:51:10,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:51:10,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:51:10,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:51:10,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:51:10,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:51:10,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:51:10,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:51:10,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:51:10,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:51:10,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:51:10,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:51:10,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:51:10,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:51:10,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:51:10,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:51:10,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:51:10,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:51:10,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:51:10,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:51:10,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:51:10,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:51:10,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:51:10,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:51:10,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:51:10,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:51:10,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:51:10,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:51:10,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:51:10,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:51:10,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:51:10,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:51:10,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:51:10,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:51:10,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-14 12:51:10,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:51:10,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:51:10,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:51:10,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:51:10,108 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:51:10,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:51:10,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:51:10,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:51:10,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:51:10,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:51:10,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:51:10,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:51:10,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:51:10,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:51:10,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:51:10,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:51:10,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:51:10,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:51:10,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:51:10,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:51:10,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:51:10,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:51:10,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:51:10,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:51:10,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:51:10,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:51:10,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:51:10,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:51:10,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:51:10,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:51:10,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:51:10,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:51:10,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:51:10,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:51:10,598 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:51:10,599 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-14 12:51:10,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad17c12a6/74834453471f493eba183cf8e8836b4a/FLAGb1f8cdba2 [2020-09-14 12:51:11,327 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:51:11,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-14 12:51:11,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad17c12a6/74834453471f493eba183cf8e8836b4a/FLAGb1f8cdba2 [2020-09-14 12:51:11,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad17c12a6/74834453471f493eba183cf8e8836b4a [2020-09-14 12:51:11,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:51:11,624 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:51:11,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:11,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:51:11,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:51:11,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:11" (1/1) ... [2020-09-14 12:51:11,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12212627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:11, skipping insertion in model container [2020-09-14 12:51:11,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:11" (1/1) ... [2020-09-14 12:51:11,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:51:11,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:51:12,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:12,287 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:51:12,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:12,470 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:51:12,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12 WrapperNode [2020-09-14 12:51:12,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:12,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:12,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:51:12,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:51:12,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:12,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:51:12,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:51:12,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:51:12,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:51:12,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:51:12,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:51:12,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:51:12,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (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 [2020-09-14 12:51:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:51:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:51:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:51:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:51:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:51:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:51:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:51:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:51:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:51:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:51:12,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:51:12,665 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:51:12,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:51:12,982 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:51:12,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:12 BoogieIcfgContainer [2020-09-14 12:51:12,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:51:12,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:51:12,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:51:12,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:51:12,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:51:11" (1/3) ... [2020-09-14 12:51:12,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a00d3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:12, skipping insertion in model container [2020-09-14 12:51:12,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (2/3) ... [2020-09-14 12:51:12,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a00d3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:12, skipping insertion in model container [2020-09-14 12:51:12,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:12" (3/3) ... [2020-09-14 12:51:13,000 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-14 12:51:13,015 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:51:13,015 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:51:13,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:51:13,030 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:51:13,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,063 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,063 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,063 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,064 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,064 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,065 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,065 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,065 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,066 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,068 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,069 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,069 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,069 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,070 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,071 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,075 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,076 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,085 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,085 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,086 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,086 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,086 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,087 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:51:13,150 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:51:13,150 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:51:13,151 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:51:13,151 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:51:13,151 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:51:13,151 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:51:13,151 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:51:13,151 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:51:13,176 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,178 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,222 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:13,223 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:13,230 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. [2020-09-14 12:51:13,233 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,252 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:13,252 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:13,253 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. [2020-09-14 12:51:13,255 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-14 12:51:13,257 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:51:14,478 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-14 12:51:14,715 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-14 12:51:14,716 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-14 12:51:14,720 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:51:14,733 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:51:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:51:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:51:14,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:14,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:51:14,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-14 12:51:14,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:14,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675086120] [2020-09-14 12:51:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675086120] [2020-09-14 12:51:15,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:51:15,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571074126] [2020-09-14 12:51:15,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:51:15,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:51:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:51:15,136 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:51:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,223 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-14 12:51:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:51:15,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:51:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,241 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:15,241 INFO L226 Difference]: Without dead ends: 42 [2020-09-14 12:51:15,243 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 [2020-09-14 12:51:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-14 12:51:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-14 12:51:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-14 12:51:15,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-14 12:51:15,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,290 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-14 12:51:15,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:51:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-14 12:51:15,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:51:15,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:51:15,292 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-14 12:51:15,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599178075] [2020-09-14 12:51:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599178075] [2020-09-14 12:51:15,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:51:15,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89387801] [2020-09-14 12:51:15,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:51:15,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:51:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:51:15,386 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-14 12:51:15,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,418 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-14 12:51:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-14 12:51:15,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:51:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,420 INFO L225 Difference]: With dead ends: 56 [2020-09-14 12:51:15,420 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:15,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:15,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-14 12:51:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-14 12:51:15,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-14 12:51:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,430 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-14 12:51:15,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:51:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-14 12:51:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:51:15,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-14 12:51:15,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991114089] [2020-09-14 12:51:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991114089] [2020-09-14 12:51:15,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803007385] [2020-09-14 12:51:15,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,532 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-14 12:51:15,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,633 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-14 12:51:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:15,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,637 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:15,637 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:15,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-14 12:51:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:15,647 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-14 12:51:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,647 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:15,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:51:15,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-14 12:51:15,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146167965] [2020-09-14 12:51:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146167965] [2020-09-14 12:51:15,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846693682] [2020-09-14 12:51:15,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,728 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-14 12:51:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,814 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:15,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,815 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:15,816 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:15,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-14 12:51:15,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-14 12:51:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,822 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-14 12:51:15,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-14 12:51:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:51:15,824 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-14 12:51:15,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502057246] [2020-09-14 12:51:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502057246] [2020-09-14 12:51:15,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122237372] [2020-09-14 12:51:15,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,907 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-14 12:51:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,000 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-14 12:51:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:16,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,002 INFO L225 Difference]: With dead ends: 57 [2020-09-14 12:51:16,002 INFO L226 Difference]: Without dead ends: 51 [2020-09-14 12:51:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-14 12:51:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-14 12:51:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:16,008 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-14 12:51:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,008 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:16,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:16,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,010 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-14 12:51:16,010 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-14 12:51:16,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038454304] [2020-09-14 12:51:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038454304] [2020-09-14 12:51:16,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873970694] [2020-09-14 12:51:16,094 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 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 [2020-09-14 12:51:16,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:16,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:16,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:16,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:16,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531446624] [2020-09-14 12:51:16,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:16,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:16,251 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-14 12:51:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,387 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-14 12:51:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:16,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,388 INFO L225 Difference]: With dead ends: 48 [2020-09-14 12:51:16,388 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:16,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-14 12:51:16,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-14 12:51:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,394 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-14 12:51:16,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-14 12:51:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:16,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,395 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-14 12:51:16,599 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-14 12:51:16,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977906347] [2020-09-14 12:51:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977906347] [2020-09-14 12:51:16,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265883353] [2020-09-14 12:51:16,705 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 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 [2020-09-14 12:51:16,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:16,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:16,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:16,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:16,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813205783] [2020-09-14 12:51:16,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:16,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:16,786 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-14 12:51:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,918 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:16,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,920 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:16,920 INFO L226 Difference]: Without dead ends: 48 [2020-09-14 12:51:16,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-14 12:51:16,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-14 12:51:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-14 12:51:16,930 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-14 12:51:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,931 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-14 12:51:16,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-14 12:51:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:16,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,932 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,145 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,146 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-14 12:51:17,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638523644] [2020-09-14 12:51:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638523644] [2020-09-14 12:51:17,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977615476] [2020-09-14 12:51:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-14 12:51:17,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:17,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774681882] [2020-09-14 12:51:17,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:17,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:17,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:17,352 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-14 12:51:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,491 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-14 12:51:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:51:17,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,493 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:17,493 INFO L226 Difference]: Without dead ends: 52 [2020-09-14 12:51:17,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-14 12:51:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-14 12:51:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:17,499 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-14 12:51:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,500 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:17,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,501 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,713 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-14 12:51:17,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128824976] [2020-09-14 12:51:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128824976] [2020-09-14 12:51:17,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75192211] [2020-09-14 12:51:17,793 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 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 [2020-09-14 12:51:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:17,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54424731] [2020-09-14 12:51:17,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:17,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:17,876 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-14 12:51:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:18,054 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:18,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:18,056 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:18,056 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:18,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-14 12:51:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-14 12:51:18,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-14 12:51:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:18,064 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-14 12:51:18,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-14 12:51:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:18,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,065 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,276 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,278 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-14 12:51:18,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042207485] [2020-09-14 12:51:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042207485] [2020-09-14 12:51:18,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983984208] [2020-09-14 12:51:18,387 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 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 [2020-09-14 12:51:18,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:18,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:18,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:18,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018953894] [2020-09-14 12:51:18,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:18,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:18,493 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-14 12:51:18,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:18,682 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-14 12:51:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:18,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:18,684 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:18,684 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:18,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:18,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-14 12:51:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-14 12:51:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-14 12:51:18,689 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-14 12:51:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:18,690 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-14 12:51:18,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-14 12:51:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:18,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-14 12:51:18,902 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-14 12:51:18,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489607405] [2020-09-14 12:51:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489607405] [2020-09-14 12:51:18,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631044725] [2020-09-14 12:51:18,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-14 12:51:19,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:51:19,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:19,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:19,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:19,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:19,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158348947] [2020-09-14 12:51:19,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:19,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:19,061 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-14 12:51:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,194 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-14 12:51:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:19,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,195 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:19,195 INFO L226 Difference]: Without dead ends: 58 [2020-09-14 12:51:19,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-14 12:51:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-14 12:51:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-14 12:51:19,208 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-14 12:51:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,209 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-14 12:51:19,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-14 12:51:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,423 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-14 12:51:19,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217228408] [2020-09-14 12:51:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217228408] [2020-09-14 12:51:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105059790] [2020-09-14 12:51:19,513 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 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 [2020-09-14 12:51:19,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:19,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:19,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:19,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827613639] [2020-09-14 12:51:19,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:19,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:19,638 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-14 12:51:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,852 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-14 12:51:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:19,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,854 INFO L225 Difference]: With dead ends: 61 [2020-09-14 12:51:19,854 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:19,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-14 12:51:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:19,859 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-14 12:51:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,860 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:19,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:19,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,073 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-14 12:51:20,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003044246] [2020-09-14 12:51:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003044246] [2020-09-14 12:51:20,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349986369] [2020-09-14 12:51:20,155 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 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 [2020-09-14 12:51:20,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:20,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674804881] [2020-09-14 12:51:20,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:20,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:20,216 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-14 12:51:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,381 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:20,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,383 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:20,383 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:20,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-14 12:51:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-14 12:51:20,391 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-14 12:51:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,392 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-14 12:51:20,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-14 12:51:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:20,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:51:20,604 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-14 12:51:20,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047055218] [2020-09-14 12:51:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047055218] [2020-09-14 12:51:20,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605025906] [2020-09-14 12:51:20,681 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 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 [2020-09-14 12:51:20,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:20,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:20,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989148059] [2020-09-14 12:51:20,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:20,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:20,785 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-14 12:51:21,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,055 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-14 12:51:21,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:21,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:21,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,056 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:21,057 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:21,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-14 12:51:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-14 12:51:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-14 12:51:21,066 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-14 12:51:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,067 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-14 12:51:21,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-14 12:51:21,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:21,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,068 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,271 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-14 12:51:21,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010392670] [2020-09-14 12:51:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010392670] [2020-09-14 12:51:21,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672889834] [2020-09-14 12:51:21,341 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 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 [2020-09-14 12:51:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:21,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879686208] [2020-09-14 12:51:21,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:21,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:21,433 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-14 12:51:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,637 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-14 12:51:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:21,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,639 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:21,639 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:21,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-14 12:51:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:21,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-14 12:51:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,644 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:21,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:21,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,645 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:51:21,856 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-14 12:51:21,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85174588] [2020-09-14 12:51:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85174588] [2020-09-14 12:51:21,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719539237] [2020-09-14 12:51:21,971 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 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 [2020-09-14 12:51:22,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:22,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:22,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620931111] [2020-09-14 12:51:22,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:22,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:22,067 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-14 12:51:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,317 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-14 12:51:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:22,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,318 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:22,318 INFO L226 Difference]: Without dead ends: 49 [2020-09-14 12:51:22,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-14 12:51:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-14 12:51:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-14 12:51:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-14 12:51:22,323 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-14 12:51:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,324 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-14 12:51:22,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-14 12:51:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:22,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,325 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:51:22,526 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-14 12:51:22,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997242197] [2020-09-14 12:51:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997242197] [2020-09-14 12:51:22,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573404568] [2020-09-14 12:51:22,623 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 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 [2020-09-14 12:51:22,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:22,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:22,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102251761] [2020-09-14 12:51:22,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:22,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:22,702 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-14 12:51:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,807 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-14 12:51:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:22,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,808 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:22,808 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:22,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-14 12:51:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-14 12:51:22,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-14 12:51:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,813 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-14 12:51:22,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-14 12:51:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:22,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,814 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:51:23,024 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-14 12:51:23,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912684030] [2020-09-14 12:51:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912684030] [2020-09-14 12:51:23,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167539679] [2020-09-14 12:51:23,116 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 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 [2020-09-14 12:51:23,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:23,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:23,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909716165] [2020-09-14 12:51:23,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:23,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:23,213 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-14 12:51:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,382 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-14 12:51:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:23,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,383 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:23,383 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:23,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-14 12:51:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:23,387 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-14 12:51:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,388 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:23,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,388 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:51:23,597 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-14 12:51:23,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407553358] [2020-09-14 12:51:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407553358] [2020-09-14 12:51:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895548230] [2020-09-14 12:51:23,700 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 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 [2020-09-14 12:51:23,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:23,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939592583] [2020-09-14 12:51:23,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:23,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:23,788 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-14 12:51:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,964 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-14 12:51:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:23,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,966 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:23,966 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:23,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:23,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-14 12:51:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-14 12:51:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-14 12:51:23,969 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-14 12:51:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,969 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-14 12:51:23,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-14 12:51:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,970 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,179 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-14 12:51:24,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816820869] [2020-09-14 12:51:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816820869] [2020-09-14 12:51:24,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65985112] [2020-09-14 12:51:24,266 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 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 [2020-09-14 12:51:24,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:24,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78225678] [2020-09-14 12:51:24,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:24,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:24,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:24,378 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-14 12:51:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:24,624 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-14 12:51:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:24,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:24,625 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:24,625 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:24,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-14 12:51:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:24,629 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-14 12:51:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:24,630 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:24,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:24,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:24,630 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,841 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-14 12:51:24,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319935745] [2020-09-14 12:51:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319935745] [2020-09-14 12:51:24,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321436394] [2020-09-14 12:51:24,931 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 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 [2020-09-14 12:51:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:25,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:25,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127274813] [2020-09-14 12:51:25,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:25,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:25,035 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-14 12:51:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,258 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:25,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,263 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:25,263 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:25,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-14 12:51:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-14 12:51:25,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-14 12:51:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,267 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-14 12:51:25,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-14 12:51:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:25,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,268 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,478 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-14 12:51:25,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298838974] [2020-09-14 12:51:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298838974] [2020-09-14 12:51:25,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633852565] [2020-09-14 12:51:25,547 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 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 [2020-09-14 12:51:25,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:25,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:25,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:25,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091526958] [2020-09-14 12:51:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:25,631 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-14 12:51:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,895 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-14 12:51:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:25,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,897 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:25,897 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:25,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-14 12:51:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:51:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-14 12:51:25,900 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-14 12:51:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,901 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-14 12:51:25,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-14 12:51:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:25,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,902 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:26,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-14 12:51:26,110 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:26,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-14 12:51:26,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:26,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689478748] [2020-09-14 12:51:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689478748] [2020-09-14 12:51:26,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396826456] [2020-09-14 12:51:26,235 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 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 [2020-09-14 12:51:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:26,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491598325] [2020-09-14 12:51:26,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:26,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:26,317 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-14 12:51:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,492 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-14 12:51:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:26,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,494 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:26,494 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:26,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-14 12:51:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:26,497 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,498 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:26,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:26,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:26,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:51:26,709 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-14 12:51:26,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:26,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477790320] [2020-09-14 12:51:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477790320] [2020-09-14 12:51:26,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442965759] [2020-09-14 12:51:26,810 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 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 [2020-09-14 12:51:26,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:26,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397509452] [2020-09-14 12:51:26,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:26,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:26,916 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,171 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-14 12:51:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:27,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,172 INFO L225 Difference]: With dead ends: 71 [2020-09-14 12:51:27,172 INFO L226 Difference]: Without dead ends: 65 [2020-09-14 12:51:27,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-14 12:51:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-14 12:51:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:27,175 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,175 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:27,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:27,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-14 12:51:27,377 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-14 12:51:27,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152580903] [2020-09-14 12:51:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152580903] [2020-09-14 12:51:27,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377180538] [2020-09-14 12:51:27,476 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 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 [2020-09-14 12:51:27,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881387332] [2020-09-14 12:51:27,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:27,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:27,570 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,784 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-14 12:51:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:27,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,785 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:27,785 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:27,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-14 12:51:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:27,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,789 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:27,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:27,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,790 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:51:27,997 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-14 12:51:27,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168799532] [2020-09-14 12:51:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168799532] [2020-09-14 12:51:28,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077402936] [2020-09-14 12:51:28,087 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 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 [2020-09-14 12:51:28,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:28,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502171674] [2020-09-14 12:51:28,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:28,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:28,166 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,465 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-14 12:51:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:28,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,466 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:28,467 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:28,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-14 12:51:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:28,471 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,471 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:28,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:28,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:28,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:51:28,673 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-14 12:51:28,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:28,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082440543] [2020-09-14 12:51:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082440543] [2020-09-14 12:51:28,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715250960] [2020-09-14 12:51:28,761 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 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 [2020-09-14 12:51:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:28,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669969034] [2020-09-14 12:51:28,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:28,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:28,861 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:29,104 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:29,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:29,106 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:29,106 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:29,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-14 12:51:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-14 12:51:29,109 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-14 12:51:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:29,110 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-14 12:51:29,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-14 12:51:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:29,110 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:29,110 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,311 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-14 12:51:29,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120032841] [2020-09-14 12:51:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120032841] [2020-09-14 12:51:29,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429474466] [2020-09-14 12:51:29,390 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 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 [2020-09-14 12:51:29,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:29,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:29,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:29,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854480811] [2020-09-14 12:51:29,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:29,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:29,491 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-14 12:51:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:29,856 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-14 12:51:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:29,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:29,857 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:29,857 INFO L226 Difference]: Without dead ends: 56 [2020-09-14 12:51:29,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-14 12:51:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-14 12:51:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-14 12:51:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-14 12:51:29,860 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-14 12:51:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:29,860 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-14 12:51:29,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-14 12:51:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:29,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:29,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:30,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:51:30,062 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-14 12:51:30,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367793375] [2020-09-14 12:51:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367793375] [2020-09-14 12:51:30,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288480039] [2020-09-14 12:51:30,144 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:30,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634357254] [2020-09-14 12:51:30,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:30,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:30,228 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-14 12:51:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:30,568 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-14 12:51:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:30,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:30,570 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:30,570 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:30,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:30,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-14 12:51:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:30,573 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-14 12:51:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:30,573 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:30,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:30,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:30,574 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:30,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:51:30,775 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-14 12:51:30,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:30,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167311969] [2020-09-14 12:51:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167311969] [2020-09-14 12:51:30,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3635500] [2020-09-14 12:51:30,876 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:30,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:30,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228189111] [2020-09-14 12:51:30,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:30,973 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-14 12:51:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,347 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-14 12:51:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:31,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,349 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:31,349 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:31,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-14 12:51:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-14 12:51:31,352 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-14 12:51:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,352 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-14 12:51:31,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-14 12:51:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:31,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,353 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,554 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-14 12:51:31,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254756184] [2020-09-14 12:51:31,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254756184] [2020-09-14 12:51:31,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932692514] [2020-09-14 12:51:31,666 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:31,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:31,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929754520] [2020-09-14 12:51:31,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:31,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:31,757 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-14 12:51:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,935 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-14 12:51:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:31,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,936 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:31,937 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:31,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-14 12:51:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:31,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-14 12:51:31,941 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-14 12:51:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,941 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-14 12:51:31,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-14 12:51:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:31,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,943 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:32,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,152 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-14 12:51:32,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:32,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230808527] [2020-09-14 12:51:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230808527] [2020-09-14 12:51:32,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813429860] [2020-09-14 12:51:32,271 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:32,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:32,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783391223] [2020-09-14 12:51:32,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:32,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:32,347 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-14 12:51:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:32,563 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-14 12:51:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:32,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:32,564 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:32,565 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:32,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-14 12:51:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-14 12:51:32,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-14 12:51:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:32,568 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-14 12:51:32,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-14 12:51:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:32,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:32,569 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:32,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-14 12:51:32,777 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-14 12:51:32,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:32,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955787955] [2020-09-14 12:51:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955787955] [2020-09-14 12:51:32,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024318968] [2020-09-14 12:51:32,891 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322464149] [2020-09-14 12:51:32,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:32,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:32,958 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-14 12:51:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,186 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-14 12:51:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:33,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,187 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:33,187 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:33,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-14 12:51:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:33,190 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-14 12:51:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,191 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:33,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,191 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:33,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,392 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-14 12:51:33,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:33,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116995396] [2020-09-14 12:51:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116995396] [2020-09-14 12:51:33,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851130723] [2020-09-14 12:51:33,503 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:33,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:33,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:33,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964155017] [2020-09-14 12:51:33,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:33,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:33,605 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-14 12:51:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,913 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-14 12:51:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:33,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,919 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:33,919 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:33,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-14 12:51:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:33,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-14 12:51:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,922 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:33,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,923 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:51:34,124 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,124 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-14 12:51:34,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194108308] [2020-09-14 12:51:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194108308] [2020-09-14 12:51:34,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129297875] [2020-09-14 12:51:34,246 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:34,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10308086] [2020-09-14 12:51:34,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:34,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:34,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:34,330 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-14 12:51:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:34,655 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-14 12:51:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:34,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:34,657 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:34,657 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:34,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-14 12:51:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:51:34,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-14 12:51:34,663 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-14 12:51:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:34,664 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-14 12:51:34,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-14 12:51:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:34,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:34,665 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,879 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-14 12:51:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111234755] [2020-09-14 12:51:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111234755] [2020-09-14 12:51:34,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805403235] [2020-09-14 12:51:35,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:35,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:35,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467676107] [2020-09-14 12:51:35,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:35,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:35,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:35,090 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-14 12:51:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,458 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-14 12:51:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:35,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:35,460 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:35,460 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:51:35,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:51:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-14 12:51:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:35,463 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-14 12:51:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:35,463 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:35,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:35,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:35,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:35,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:51:35,667 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-14 12:51:35,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:35,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600478948] [2020-09-14 12:51:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600478948] [2020-09-14 12:51:35,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969923393] [2020-09-14 12:51:35,767 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:35,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:35,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:35,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209872661] [2020-09-14 12:51:35,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:35,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:35,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:35,857 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-14 12:51:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,160 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-14 12:51:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:36,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:36,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,161 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:51:36,161 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:51:36,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:51:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-14 12:51:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-14 12:51:36,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-14 12:51:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,165 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-14 12:51:36,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-14 12:51:36,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:36,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,166 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:36,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:51:36,375 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-14 12:51:36,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:36,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667561643] [2020-09-14 12:51:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667561643] [2020-09-14 12:51:36,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74044195] [2020-09-14 12:51:36,474 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:36,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:36,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:36,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:36,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:36,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:36,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803698308] [2020-09-14 12:51:36,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:36,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:36,564 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-14 12:51:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,982 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-14 12:51:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:36,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,984 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:36,984 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:36,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-14 12:51:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-14 12:51:36,988 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-14 12:51:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,988 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-14 12:51:36,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-14 12:51:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:36,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-14 12:51:37,197 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-14 12:51:37,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341494374] [2020-09-14 12:51:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341494374] [2020-09-14 12:51:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951027040] [2020-09-14 12:51:37,339 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:37,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407621174] [2020-09-14 12:51:37,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:37,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:37,413 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-14 12:51:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:37,613 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:51:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:37,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:37,614 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:37,614 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:37,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-14 12:51:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:37,617 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:37,618 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:37,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:37,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:37,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:51:37,831 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-14 12:51:37,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198647278] [2020-09-14 12:51:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198647278] [2020-09-14 12:51:37,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568640259] [2020-09-14 12:51:37,968 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:38,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307277329] [2020-09-14 12:51:38,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:38,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:38,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:38,058 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:38,367 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-14 12:51:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:38,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:38,368 INFO L225 Difference]: With dead ends: 81 [2020-09-14 12:51:38,368 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:51:38,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:51:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-14 12:51:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:38,371 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:38,372 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:38,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:38,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:38,373 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:38,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:51:38,581 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:38,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-14 12:51:38,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:38,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068983470] [2020-09-14 12:51:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068983470] [2020-09-14 12:51:38,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627113040] [2020-09-14 12:51:38,698 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:38,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939829387] [2020-09-14 12:51:38,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:38,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:38,769 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,080 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:39,080 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,082 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:39,082 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:39,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-14 12:51:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:39,085 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,086 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:39,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:39,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:39,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-14 12:51:39,295 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-14 12:51:39,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:39,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359843863] [2020-09-14 12:51:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359843863] [2020-09-14 12:51:39,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496100406] [2020-09-14 12:51:39,412 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:39,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:39,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:39,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:39,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616702239] [2020-09-14 12:51:39,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:39,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:39,546 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,890 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:39,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:39,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:39,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,892 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:39,892 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:39,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:39,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-14 12:51:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:39,895 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,895 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:39,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:39,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:51:40,104 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,104 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-14 12:51:40,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338451973] [2020-09-14 12:51:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338451973] [2020-09-14 12:51:40,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754154235] [2020-09-14 12:51:40,223 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:40,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971345759] [2020-09-14 12:51:40,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:40,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:40,299 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:40,608 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-14 12:51:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:40,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:40,609 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:40,609 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:40,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-14 12:51:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:40,613 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:40,613 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:40,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:40,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:40,614 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,822 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-14 12:51:40,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522774851] [2020-09-14 12:51:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522774851] [2020-09-14 12:51:40,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128834957] [2020-09-14 12:51:40,925 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:40,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:41,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116711531] [2020-09-14 12:51:41,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:41,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:41,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:41,034 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:41,489 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-14 12:51:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:41,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:41,491 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:51:41,491 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:51:41,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:51:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-14 12:51:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:41,495 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:41,495 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:41,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:41,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:41,496 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:41,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:51:41,706 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-14 12:51:41,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:41,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980091713] [2020-09-14 12:51:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980091713] [2020-09-14 12:51:41,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332807707] [2020-09-14 12:51:41,810 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:41,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764781473] [2020-09-14 12:51:41,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:41,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:41,879 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:42,238 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:51:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:42,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:42,240 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:42,240 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:42,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-14 12:51:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:51:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-14 12:51:42,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-14 12:51:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:42,244 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-14 12:51:42,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-14 12:51:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:42,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:42,245 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:42,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,456 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-14 12:51:42,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:42,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892844722] [2020-09-14 12:51:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892844722] [2020-09-14 12:51:42,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888527241] [2020-09-14 12:51:42,564 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:42,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:42,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667501681] [2020-09-14 12:51:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:42,660 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-14 12:51:43,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:43,093 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-14 12:51:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:43,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:43,094 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:43,095 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:43,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-14 12:51:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-14 12:51:43,098 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-14 12:51:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:43,098 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-14 12:51:43,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-14 12:51:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:43,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:43,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:43,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:51:43,307 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-14 12:51:43,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:43,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211428982] [2020-09-14 12:51:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211428982] [2020-09-14 12:51:43,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321279810] [2020-09-14 12:51:43,412 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:43,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:43,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:43,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:43,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491371287] [2020-09-14 12:51:43,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:43,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:43,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:43,505 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-14 12:51:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:43,982 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-14 12:51:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:43,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:43,984 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:43,984 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:43,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-14 12:51:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:43,987 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-14 12:51:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:43,987 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:43,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:43,988 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:44,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,198 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-14 12:51:44,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:44,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33765547] [2020-09-14 12:51:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33765547] [2020-09-14 12:51:44,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144226697] [2020-09-14 12:51:44,302 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:44,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:44,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:44,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:44,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887607842] [2020-09-14 12:51:44,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:44,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:44,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:44,391 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-14 12:51:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,885 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-14 12:51:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:44,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,886 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:44,887 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:44,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-14 12:51:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-14 12:51:44,890 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-14 12:51:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,890 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-14 12:51:44,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-14 12:51:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:44,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,891 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-14 12:51:45,094 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-14 12:51:45,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718004976] [2020-09-14 12:51:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718004976] [2020-09-14 12:51:45,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605643638] [2020-09-14 12:51:45,231 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:45,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:45,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:45,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:45,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184724810] [2020-09-14 12:51:45,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:45,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:45,320 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-14 12:51:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:45,559 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-14 12:51:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:45,560 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:45,561 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:51:45,561 INFO L226 Difference]: Without dead ends: 66 [2020-09-14 12:51:45,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-14 12:51:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-14 12:51:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-14 12:51:45,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-14 12:51:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:45,566 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-14 12:51:45,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-14 12:51:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:45,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:45,567 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:51:45,776 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-14 12:51:45,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519950415] [2020-09-14 12:51:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519950415] [2020-09-14 12:51:45,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68954432] [2020-09-14 12:51:45,961 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:46,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:46,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712425876] [2020-09-14 12:51:46,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:46,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:46,079 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-14 12:51:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:46,380 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-14 12:51:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:46,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:46,381 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:51:46,382 INFO L226 Difference]: Without dead ends: 76 [2020-09-14 12:51:46,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-14 12:51:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-14 12:51:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-14 12:51:46,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-14 12:51:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:46,386 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-14 12:51:46,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-14 12:51:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:46,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:46,387 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:46,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:51:46,598 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-14 12:51:46,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:46,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052541269] [2020-09-14 12:51:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052541269] [2020-09-14 12:51:46,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429502579] [2020-09-14 12:51:46,734 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:46,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278508169] [2020-09-14 12:51:46,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:46,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:46,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:46,797 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-14 12:51:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:47,071 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-14 12:51:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:47,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:47,076 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:47,076 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:47,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-14 12:51:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-14 12:51:47,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-14 12:51:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:47,082 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-14 12:51:47,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-14 12:51:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:47,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:47,082 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:47,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-14 12:51:47,293 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-14 12:51:47,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:47,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495178155] [2020-09-14 12:51:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495178155] [2020-09-14 12:51:47,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6406509] [2020-09-14 12:51:47,445 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:47,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:47,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:47,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:47,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:47,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739963214] [2020-09-14 12:51:47,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:47,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:47,552 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-14 12:51:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:47,911 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-14 12:51:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:47,915 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:47,915 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:47,915 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:47,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-14 12:51:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-14 12:51:47,918 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-14 12:51:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:47,918 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-14 12:51:47,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-14 12:51:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:47,919 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:48,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,128 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-14 12:51:48,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:48,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865326792] [2020-09-14 12:51:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865326792] [2020-09-14 12:51:48,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668526899] [2020-09-14 12:51:48,269 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:48,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:48,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122171311] [2020-09-14 12:51:48,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:48,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:48,341 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-14 12:51:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:48,708 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-14 12:51:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:48,708 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:48,709 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:48,709 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:48,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-14 12:51:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:48,716 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-14 12:51:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:48,716 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:48,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:48,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:48,717 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:48,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,927 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:48,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-14 12:51:48,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:48,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036250657] [2020-09-14 12:51:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036250657] [2020-09-14 12:51:49,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595303558] [2020-09-14 12:51:49,056 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:49,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:49,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:49,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:49,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32630746] [2020-09-14 12:51:49,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:49,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:49,150 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-14 12:51:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:49,595 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-14 12:51:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:49,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:49,597 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:51:49,597 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:51:49,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:51:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:51:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-14 12:51:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:49,600 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-14 12:51:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:49,600 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:49,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:49,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:49,601 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:49,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:51:49,809 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-14 12:51:49,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:49,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971026240] [2020-09-14 12:51:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971026240] [2020-09-14 12:51:49,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247290604] [2020-09-14 12:51:49,944 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:49,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:49,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:50,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:50,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310006650] [2020-09-14 12:51:50,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:50,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:50,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:50,016 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-14 12:51:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:50,416 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-14 12:51:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:51:50,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:50,418 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:50,418 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:50,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-14 12:51:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:51:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-14 12:51:50,421 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-14 12:51:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:50,421 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-14 12:51:50,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-14 12:51:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:50,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:50,422 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:50,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,628 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-14 12:51:50,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:50,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322520415] [2020-09-14 12:51:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322520415] [2020-09-14 12:51:50,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337270585] [2020-09-14 12:51:50,752 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:50,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:50,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:50,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487679647] [2020-09-14 12:51:50,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:50,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:50,863 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-14 12:51:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:51,380 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-14 12:51:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:51,381 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:51,382 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:51,382 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:51,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-14 12:51:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:51,384 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-14 12:51:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:51,385 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:51,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:51,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:51,385 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:51,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:51:51,586 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-14 12:51:51,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:51,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561554720] [2020-09-14 12:51:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561554720] [2020-09-14 12:51:51,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111365065] [2020-09-14 12:51:51,717 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:51,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:51,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782959374] [2020-09-14 12:51:51,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:51,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:51,791 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-14 12:51:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:52,263 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:51:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:51:52,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:52,265 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:51:52,265 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:51:52,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:51:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:51:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-14 12:51:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:51:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-14 12:51:52,267 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-14 12:51:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:52,268 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-14 12:51:52,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-14 12:51:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:52,268 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:52,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:51:52,475 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:52,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-14 12:51:52,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:52,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573374703] [2020-09-14 12:51:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573374703] [2020-09-14 12:51:52,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893619571] [2020-09-14 12:51:52,605 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:52,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:52,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:52,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:52,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523430617] [2020-09-14 12:51:52,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:52,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:52,720 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-14 12:51:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:53,300 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-14 12:51:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:51:53,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:53,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:53,301 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:51:53,301 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:53,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:51:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-14 12:51:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:51:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-14 12:51:53,305 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-14 12:51:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:53,305 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-14 12:51:53,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-14 12:51:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:53,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:53,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:53,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:51:53,512 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-14 12:51:53,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:53,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100589965] [2020-09-14 12:51:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100589965] [2020-09-14 12:51:53,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742322805] [2020-09-14 12:51:53,689 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:53,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:53,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:53,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:53,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:53,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:53,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303394786] [2020-09-14 12:51:53,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:53,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:53,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:53,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:53,778 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-14 12:51:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:54,049 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-14 12:51:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:54,049 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:54,051 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:51:54,051 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:51:54,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:51:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-14 12:51:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:54,054 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:54,054 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:54,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:54,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:54,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:54,055 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:54,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-14 12:51:54,264 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-14 12:51:54,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:54,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362220766] [2020-09-14 12:51:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:54,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362220766] [2020-09-14 12:51:54,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114143617] [2020-09-14 12:51:54,438 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:54,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:54,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:54,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:54,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:54,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:54,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:54,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144229963] [2020-09-14 12:51:54,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:54,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:54,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:54,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:54,534 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:54,864 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-14 12:51:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:54,865 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:54,866 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:51:54,866 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:51:54,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:51:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-14 12:51:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:54,871 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:54,871 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:54,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:54,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:54,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:55,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-14 12:51:55,073 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-14 12:51:55,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:55,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582821003] [2020-09-14 12:51:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582821003] [2020-09-14 12:51:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215574450] [2020-09-14 12:51:55,238 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:55,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:55,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:55,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646639978] [2020-09-14 12:51:55,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:55,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:55,308 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:51:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:55,650 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:55,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:55,651 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:55,652 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:55,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-14 12:51:55,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:55,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:55,655 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:55,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:55,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:55,656 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:55,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,857 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-14 12:51:55,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:55,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580858932] [2020-09-14 12:51:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580858932] [2020-09-14 12:51:56,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243128750] [2020-09-14 12:51:56,029 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:56,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:56,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:56,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:56,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:56,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466438604] [2020-09-14 12:51:56,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:56,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:56,138 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:56,597 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-14 12:51:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:56,598 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:56,599 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:56,599 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:56,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-14 12:51:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:56,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:56,603 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:56,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:56,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:56,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:56,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:56,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,805 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-14 12:51:56,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:56,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179865166] [2020-09-14 12:51:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179865166] [2020-09-14 12:51:56,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084723856] [2020-09-14 12:51:56,930 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:56,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:57,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:57,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426649775] [2020-09-14 12:51:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:57,014 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:51:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:57,412 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-14 12:51:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:57,413 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:57,414 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:57,414 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:57,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:51:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-14 12:51:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:57,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:57,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:57,417 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:57,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:57,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:57,417 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:57,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-14 12:51:57,618 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:57,619 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-14 12:51:57,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:57,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879925498] [2020-09-14 12:51:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879925498] [2020-09-14 12:51:57,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012986061] [2020-09-14 12:51:57,765 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:57,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:57,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:57,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:57,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:57,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100178121] [2020-09-14 12:51:57,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:57,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:57,863 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:58,396 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:58,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:58,398 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:58,398 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:58,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:51:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-14 12:51:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:58,401 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:58,401 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:58,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:58,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:58,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:58,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:58,610 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-14 12:51:58,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:58,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931934247] [2020-09-14 12:51:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931934247] [2020-09-14 12:51:58,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355400958] [2020-09-14 12:51:58,733 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:58,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:58,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:58,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781928469] [2020-09-14 12:51:58,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:58,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:58,814 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:51:59,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:59,280 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-14 12:51:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:51:59,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:59,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:59,282 INFO L225 Difference]: With dead ends: 80 [2020-09-14 12:51:59,282 INFO L226 Difference]: Without dead ends: 74 [2020-09-14 12:51:59,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-14 12:51:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-14 12:51:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:59,284 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:59,285 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:59,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:59,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:59,285 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:59,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-14 12:51:59,486 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-14 12:51:59,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:59,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849754708] [2020-09-14 12:51:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849754708] [2020-09-14 12:51:59,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589264903] [2020-09-14 12:51:59,612 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:59,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:59,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:59,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:59,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814069724] [2020-09-14 12:51:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:59,716 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:00,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:00,330 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-14 12:52:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:00,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:00,332 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:52:00,332 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:52:00,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:52:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-14 12:52:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:00,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:00,334 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:00,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:00,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:00,335 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:00,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:00,536 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:00,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:00,536 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-14 12:52:00,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:00,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579135019] [2020-09-14 12:52:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579135019] [2020-09-14 12:52:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455512235] [2020-09-14 12:52:00,676 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:00,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:52:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:00,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:00,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038874474] [2020-09-14 12:52:00,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:00,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:00,752 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:01,265 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-14 12:52:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:01,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:01,266 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:52:01,267 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:52:01,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:52:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-14 12:52:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:52:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-14 12:52:01,269 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-14 12:52:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:01,269 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-14 12:52:01,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-14 12:52:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:01,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:01,270 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:01,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-14 12:52:01,476 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-14 12:52:01,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:01,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102771635] [2020-09-14 12:52:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102771635] [2020-09-14 12:52:01,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649262385] [2020-09-14 12:52:01,615 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:01,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:52:01,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:01,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:01,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:01,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821655487] [2020-09-14 12:52:01,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:01,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:01,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:01,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:01,714 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-14 12:52:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:02,368 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-14 12:52:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:02,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:02,369 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:52:02,369 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:52:02,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:52:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-14 12:52:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:52:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-14 12:52:02,372 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-14 12:52:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:02,372 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-14 12:52:02,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-14 12:52:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:02,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:02,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:02,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,574 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:02,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-14 12:52:02,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:02,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411220830] [2020-09-14 12:52:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411220830] [2020-09-14 12:52:02,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247147400] [2020-09-14 12:52:02,706 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:02,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:02,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:02,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:02,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203742950] [2020-09-14 12:52:02,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:02,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:02,801 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-14 12:52:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:03,420 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-14 12:52:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:03,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:03,422 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:03,423 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:52:03,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:52:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-14 12:52:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-14 12:52:03,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-14 12:52:03,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:03,432 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-14 12:52:03,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-14 12:52:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:03,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:03,433 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:03,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-14 12:52:03,644 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-14 12:52:03,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:03,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215709339] [2020-09-14 12:52:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215709339] [2020-09-14 12:52:03,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21854966] [2020-09-14 12:52:03,734 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:03,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:03,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:52:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-14 12:52:03,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-09-14 12:52:03,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079068579] [2020-09-14 12:52:03,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:52:03,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:52:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:52:03,810 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-14 12:52:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:03,826 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-14 12:52:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:52:03,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-14 12:52:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:03,828 INFO L225 Difference]: With dead ends: 151 [2020-09-14 12:52:03,828 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:52:03,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:52:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:52:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-14 12:52:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:52:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-14 12:52:03,830 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-14 12:52:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:03,830 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-14 12:52:03,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:52:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-14 12:52:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:03,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:03,831 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:04,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-14 12:52:04,032 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:04,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-14 12:52:04,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:04,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529339314] [2020-09-14 12:52:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529339314] [2020-09-14 12:52:04,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591528953] [2020-09-14 12:52:04,121 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:52:04,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-14 12:52:04,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-14 12:52:04,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359615943] [2020-09-14 12:52:04,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:52:04,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:52:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:52:04,190 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-14 12:52:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:04,204 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-14 12:52:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:52:04,211 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-14 12:52:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:04,212 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:52:04,212 INFO L226 Difference]: Without dead ends: 0 [2020-09-14 12:52:04,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:52:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-14 12:52:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-14 12:52:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-14 12:52:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-14 12:52:04,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-14 12:52:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:04,213 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-14 12:52:04,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:52:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-14 12:52:04,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-14 12:52:04,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 12:52:04 BasicIcfg [2020-09-14 12:52:04,420 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-14 12:52:04,422 INFO L168 Benchmark]: Toolchain (without parser) took 52801.99 ms. Allocated memory was 147.8 MB in the beginning and 412.1 MB in the end (delta: 264.2 MB). Free memory was 101.7 MB in the beginning and 315.2 MB in the end (delta: -213.6 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,422 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 147.8 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. [2020-09-14 12:52:04,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 847.51 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 164.7 MB in the end (delta: -63.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.56 ms. Allocated memory is still 205.0 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,424 INFO L168 Benchmark]: Boogie Preprocessor took 34.74 ms. Allocated memory is still 205.0 MB. Free memory was 162.7 MB in the beginning and 161.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,424 INFO L168 Benchmark]: RCFGBuilder took 416.41 ms. Allocated memory is still 205.0 MB. Free memory was 160.8 MB in the beginning and 140.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,424 INFO L168 Benchmark]: TraceAbstraction took 51430.43 ms. Allocated memory was 205.0 MB in the beginning and 412.1 MB in the end (delta: 207.1 MB). Free memory was 140.6 MB in the beginning and 315.2 MB in the end (delta: -174.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. [2020-09-14 12:52:04,426 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 147.8 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 847.51 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 164.7 MB in the end (delta: -63.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.56 ms. Allocated memory is still 205.0 MB. Free memory was 164.7 MB in the beginning and 162.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.74 ms. Allocated memory is still 205.0 MB. Free memory was 162.7 MB in the beginning and 161.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.41 ms. Allocated memory is still 205.0 MB. Free memory was 160.8 MB in the beginning and 140.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51430.43 ms. Allocated memory was 205.0 MB in the beginning and 412.1 MB in the end (delta: 207.1 MB). Free memory was 140.6 MB in the beginning and 315.2 MB in the end (delta: -174.6 MB). Peak memory consumption was 32.5 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, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.2s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 21.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 1144 SDtfs, 3053 SDslu, 4481 SDs, 0 SdLazy, 4772 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2330 GetRequests, 841 SyntacticMatches, 64 SemanticMatches, 1425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 19.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, 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, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 117675 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 82/1440 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...