/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:41:30,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:41:30,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:41:30,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:41:30,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:41:30,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:41:30,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:41:30,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:41:30,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:41:30,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:41:30,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:41:30,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:41:30,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:41:30,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:41:30,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:41:30,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:41:30,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:41:30,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:41:30,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:41:30,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:41:30,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:41:30,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:41:30,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:41:30,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:41:30,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:41:30,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:41:30,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:41:30,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:41:30,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-16 11:41:31,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:41:31,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:41:31,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:41:31,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:41:31,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:41:31,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:41:31,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:41:31,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:41:31,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:41:31,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:41:31,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:41:31,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:41:31,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:41:31,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:41:31,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:41:31,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:41:31,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:41:31,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:41:31,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:41:31,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:41:31,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:41:31,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:41:31,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:41:31,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-16 11:41:31,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:41:31,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:41:31,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:41:31,041 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-16 11:41:31,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:41:31,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:41:31,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:41:31,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:41:31,365 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:41:31,365 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:41:31,366 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-16 11:41:31,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1764e10e0/f56eb7bd3d484181a54e00221d1b5dd5/FLAG6de652333 [2020-10-16 11:41:31,922 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:41:31,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-16 11:41:31,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1764e10e0/f56eb7bd3d484181a54e00221d1b5dd5/FLAG6de652333 [2020-10-16 11:41:32,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1764e10e0/f56eb7bd3d484181a54e00221d1b5dd5 [2020-10-16 11:41:32,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:41:32,322 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:41:32,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:32,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:41:32,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:41:32,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:32,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7267ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32, skipping insertion in model container [2020-10-16 11:41:32,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:32,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:41:32,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:41:32,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:32,873 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:41:32,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:41:32,985 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:41:32,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32 WrapperNode [2020-10-16 11:41:32,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:41:32,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:32,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:41:32,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:41:32,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:41:33,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:41:33,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:41:33,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:41:33,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (1/1) ... [2020-10-16 11:41:33,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:41:33,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:41:33,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:41:33,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:41:33,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (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 [2020-10-16 11:41:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 11:41:33,128 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 11:41:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 11:41:33,128 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 11:41:33,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:41:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 11:41:33,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:41:33,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:41:33,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 11:41:33,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:41:33,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:41:33,133 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:41:33,421 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:41:33,422 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:41:33,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:33 BoogieIcfgContainer [2020-10-16 11:41:33,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:41:33,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:41:33,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:41:33,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:41:33,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:41:32" (1/3) ... [2020-10-16 11:41:33,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684f2aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:33, skipping insertion in model container [2020-10-16 11:41:33,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:41:32" (2/3) ... [2020-10-16 11:41:33,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684f2aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:41:33, skipping insertion in model container [2020-10-16 11:41:33,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:41:33" (3/3) ... [2020-10-16 11:41:33,435 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-16 11:41:33,448 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:41:33,449 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:41:33,456 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:41:33,457 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:41:33,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,492 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,493 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,493 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,523 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,524 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,524 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:41:33,526 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 11:41:33,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:41:33,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:41:33,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:41:33,563 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-16 11:41:33,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:41:33,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:41:33,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:41:33,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:41:33,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:41:33,577 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-16 11:41:33,578 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:33,581 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:33,583 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 11:41:33,640 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 11:41:33,640 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 11:41:33,647 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. [2020-10-16 11:41:33,651 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 11:41:34,676 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 11:41:34,895 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 11:41:34,896 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 11:41:34,907 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 11:41:34,919 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 11:41:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 11:41:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 11:41:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:34,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 11:41:34,929 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 11:41:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:34,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710880421] [2020-10-16 11:41:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710880421] [2020-10-16 11:41:35,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 11:41:35,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735873049] [2020-10-16 11:41:35,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 11:41:35,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 11:41:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 11:41:35,193 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 11:41:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,283 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 11:41:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:41:35,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 11:41:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,297 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:35,297 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 11:41:35,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 11:41:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 11:41:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 11:41:35,338 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 11:41:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,338 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 11:41:35,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 11:41:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 11:41:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:41:35,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:41:35,340 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 11:41:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131552791] [2020-10-16 11:41:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131552791] [2020-10-16 11:41:35,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:41:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380784824] [2020-10-16 11:41:35,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 11:41:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 11:41:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:41:35,447 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 11:41:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,475 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 11:41:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 11:41:35,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 11:41:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,477 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:35,477 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 11:41:35,479 INFO L677 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 [2020-10-16 11:41:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 11:41:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 11:41:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 11:41:35,486 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 11:41:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 11:41:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 11:41:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 11:41:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:35,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 11:41:35,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 11:41:35,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125510997] [2020-10-16 11:41:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125510997] [2020-10-16 11:41:35,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415449667] [2020-10-16 11:41:35,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:35,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:35,588 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 11:41:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,659 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 11:41:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:35,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,662 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:35,662 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:35,662 INFO L677 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 [2020-10-16 11:41:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 11:41:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:35,671 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 11:41:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,672 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:35,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:35,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 11:41:35,674 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 11:41:35,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140449136] [2020-10-16 11:41:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140449136] [2020-10-16 11:41:35,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846976112] [2020-10-16 11:41:35,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:35,742 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 11:41:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,810 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:35,810 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,811 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:35,811 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:35,812 INFO L677 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 [2020-10-16 11:41:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 11:41:35,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 11:41:35,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,818 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 11:41:35,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 11:41:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 11:41:35,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 11:41:35,819 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 11:41:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387199741] [2020-10-16 11:41:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:35,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387199741] [2020-10-16 11:41:35,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:41:35,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 11:41:35,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323509431] [2020-10-16 11:41:35,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:41:35,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:35,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:41:35,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:41:35,880 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 11:41:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:35,947 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 11:41:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:41:35,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 11:41:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:35,951 INFO L225 Difference]: With dead ends: 57 [2020-10-16 11:41:35,951 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 11:41:35,952 INFO L677 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 [2020-10-16 11:41:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 11:41:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 11:41:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:35,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 11:41:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:35,963 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:35,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:41:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:35,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:35,964 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:35,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 11:41:35,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 11:41:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:35,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897778937] [2020-10-16 11:41:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897778937] [2020-10-16 11:41:36,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687255513] [2020-10-16 11:41:36,066 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 [2020-10-16 11:41:36,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:36,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:36,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:36,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:36,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914339126] [2020-10-16 11:41:36,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:36,184 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 11:41:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,299 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 11:41:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:36,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,301 INFO L225 Difference]: With dead ends: 48 [2020-10-16 11:41:36,301 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 11:41:36,301 INFO L677 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 [2020-10-16 11:41:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 11:41:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 11:41:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 11:41:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 11:41:36,306 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 11:41:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,307 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 11:41:36,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 11:41:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,308 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:41:36,522 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 11:41:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642248207] [2020-10-16 11:41:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:36,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642248207] [2020-10-16 11:41:36,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607452517] [2020-10-16 11:41:36,584 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 [2020-10-16 11:41:36,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:36,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:36,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:36,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:36,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521613060] [2020-10-16 11:41:36,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:36,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:36,660 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 11:41:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:36,728 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 11:41:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 11:41:36,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:36,730 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:36,730 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:36,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 11:41:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 11:41:36,735 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 11:41:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:36,736 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 11:41:36,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 11:41:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:36,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:36,737 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:36,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:36,938 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 11:41:36,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:36,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259391636] [2020-10-16 11:41:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259391636] [2020-10-16 11:41:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816806044] [2020-10-16 11:41:37,002 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 [2020-10-16 11:41:37,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:37,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:37,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:37,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937183240] [2020-10-16 11:41:37,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:37,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:37,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:37,096 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 11:41:37,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,195 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 11:41:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 11:41:37,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:37,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,196 INFO L225 Difference]: With dead ends: 58 [2020-10-16 11:41:37,196 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 11:41:37,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 11:41:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 11:41:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 11:41:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 11:41:37,202 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 11:41:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,202 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 11:41:37,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 11:41:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:37,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,203 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,416 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 11:41:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330077127] [2020-10-16 11:41:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330077127] [2020-10-16 11:41:37,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454984991] [2020-10-16 11:41:37,467 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 [2020-10-16 11:41:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:37,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:37,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 11:41:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322273463] [2020-10-16 11:41:37,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:41:37,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:37,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:41:37,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:41:37,564 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 11:41:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:37,699 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:37,700 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 11:41:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:37,701 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:37,701 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:37,701 INFO L677 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 [2020-10-16 11:41:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 11:41:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 11:41:37,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 11:41:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:37,707 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 11:41:37,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:41:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 11:41:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:41:37,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:37,708 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:37,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:37,920 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 11:41:37,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:37,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244467832] [2020-10-16 11:41:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244467832] [2020-10-16 11:41:38,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316232586] [2020-10-16 11:41:38,003 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 [2020-10-16 11:41:38,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:38,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:41:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220478199] [2020-10-16 11:41:38,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:38,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:38,085 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 11:41:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,246 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 11:41:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:38,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 11:41:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,249 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:38,249 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:38,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:41:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 11:41:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 11:41:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 11:41:38,259 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 11:41:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,259 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 11:41:38,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 11:41:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:38,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,261 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 11:41:38,474 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 11:41:38,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122639121] [2020-10-16 11:41:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122639121] [2020-10-16 11:41:38,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413197179] [2020-10-16 11:41:38,535 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 [2020-10-16 11:41:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 11:41:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112231841] [2020-10-16 11:41:38,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:38,603 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 11:41:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:38,702 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 11:41:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:38,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:38,703 INFO L225 Difference]: With dead ends: 64 [2020-10-16 11:41:38,703 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 11:41:38,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 11:41:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 11:41:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 11:41:38,708 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 11:41:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:38,708 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 11:41:38,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 11:41:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:38,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:38,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:38,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:38,921 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 11:41:38,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:38,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722581924] [2020-10-16 11:41:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722581924] [2020-10-16 11:41:38,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173626334] [2020-10-16 11:41:38,981 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 [2020-10-16 11:41:39,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:39,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379018639] [2020-10-16 11:41:39,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:39,078 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 11:41:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,237 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 11:41:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:39,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,238 INFO L225 Difference]: With dead ends: 61 [2020-10-16 11:41:39,239 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:39,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 11:41:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:39,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 11:41:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,243 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:39,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:39,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,244 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:39,452 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 11:41:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142789628] [2020-10-16 11:41:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142789628] [2020-10-16 11:41:39,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902813847] [2020-10-16 11:41:39,507 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 [2020-10-16 11:41:39,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:39,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:39,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:39,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 11:41:39,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882294429] [2020-10-16 11:41:39,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:41:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:41:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:41:39,592 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 11:41:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:39,724 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:39,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 11:41:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:39,725 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:39,726 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:39,729 INFO L677 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 [2020-10-16 11:41:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 11:41:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 11:41:39,733 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 11:41:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 11:41:39,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:41:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 11:41:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:39,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:39,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:39,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:41:39,945 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:39,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:39,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 11:41:39,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:39,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410198059] [2020-10-16 11:41:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410198059] [2020-10-16 11:41:40,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070534786] [2020-10-16 11:41:40,004 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 [2020-10-16 11:41:40,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 11:41:40,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:40,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028138559] [2020-10-16 11:41:40,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:40,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:40,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:40,069 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 11:41:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,234 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-16 11:41:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:40,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,235 INFO L225 Difference]: With dead ends: 56 [2020-10-16 11:41:40,235 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 11:41:40,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:41:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 11:41:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-16 11:41:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 11:41:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 11:41:40,238 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 11:41:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,239 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 11:41:40,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 11:41:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 11:41:40,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:40,448 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 11:41:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653500229] [2020-10-16 11:41:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653500229] [2020-10-16 11:41:40,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174544563] [2020-10-16 11:41:40,499 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 [2020-10-16 11:41:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:41:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:40,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:40,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:40,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:41:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995620475] [2020-10-16 11:41:40,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:40,579 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 11:41:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:40,740 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 11:41:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:40,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 11:41:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:40,742 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:40,742 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:40,743 INFO L677 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 [2020-10-16 11:41:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 11:41:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:40,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 11:41:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:40,746 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:40,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:40,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:40,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:40,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 11:41:40,959 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 11:41:40,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:40,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935953861] [2020-10-16 11:41:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935953861] [2020-10-16 11:41:41,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278048995] [2020-10-16 11:41:41,034 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 [2020-10-16 11:41:41,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949576936] [2020-10-16 11:41:41,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:41,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:41,112 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 11:41:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,290 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 11:41:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:41,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,291 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:41:41,291 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 11:41:41,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 11:41:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 11:41:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 11:41:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 11:41:41,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 11:41:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,295 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 11:41:41,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 11:41:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:41:41,504 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 11:41:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416242327] [2020-10-16 11:41:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416242327] [2020-10-16 11:41:41,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742509301] [2020-10-16 11:41:41,575 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 [2020-10-16 11:41:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:41,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:41,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:41,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322515138] [2020-10-16 11:41:41,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:41,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:41,630 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 11:41:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:41,721 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 11:41:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:41:41,721 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:41,722 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:41,722 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:41,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:41:41,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 11:41:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 11:41:41,726 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 11:41:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:41,727 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 11:41:41,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 11:41:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:41,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:41,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:41,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:41:41,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 11:41:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:41,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164413571] [2020-10-16 11:41:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164413571] [2020-10-16 11:41:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924958719] [2020-10-16 11:41:42,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:42,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191447248] [2020-10-16 11:41:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:42,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:42,087 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 11:41:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,215 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 11:41:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:41:42,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,216 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:42,217 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:42,217 INFO L677 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 [2020-10-16 11:41:42,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:42,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 11:41:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 11:41:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 11:41:42,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 11:41:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,221 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 11:41:42,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 11:41:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:42,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,222 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:41:42,433 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 11:41:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076907001] [2020-10-16 11:41:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076907001] [2020-10-16 11:41:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031545482] [2020-10-16 11:41:42,492 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 [2020-10-16 11:41:42,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:42,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:42,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:42,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:42,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341449725] [2020-10-16 11:41:42,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:42,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:42,573 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 11:41:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:42,748 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 11:41:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:42,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:42,749 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:42,749 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:42,750 INFO L677 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 [2020-10-16 11:41:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 11:41:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 11:41:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 11:41:42,752 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 11:41:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:42,753 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 11:41:42,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 11:41:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:42,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:42,753 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:42,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:42,954 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 11:41:42,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:42,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451481981] [2020-10-16 11:41:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451481981] [2020-10-16 11:41:43,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982467986] [2020-10-16 11:41:43,013 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 [2020-10-16 11:41:43,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:43,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866910758] [2020-10-16 11:41:43,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:43,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:43,092 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 11:41:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,280 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 11:41:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:43,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,281 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:43,281 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:43,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:43,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 11:41:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:41:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 11:41:43,285 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 11:41:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,286 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 11:41:43,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 11:41:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:43,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:43,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:43,497 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 11:41:43,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:43,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557424780] [2020-10-16 11:41:43,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557424780] [2020-10-16 11:41:43,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453747693] [2020-10-16 11:41:43,549 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 [2020-10-16 11:41:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:43,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:43,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 11:41:43,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039612383] [2020-10-16 11:41:43,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:41:43,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:43,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:41:43,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:41:43,616 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 11:41:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:43,807 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:41:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:43,809 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 11:41:43,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:43,810 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:41:43,810 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:41:43,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:41:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 11:41:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 11:41:43,819 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 11:41:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:43,819 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 11:41:43,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:41:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 11:41:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 11:41:43,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:43,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:44,021 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 11:41:44,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840089406] [2020-10-16 11:41:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840089406] [2020-10-16 11:41:44,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607210398] [2020-10-16 11:41:44,075 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 [2020-10-16 11:41:44,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:44,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:41:44,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65699186] [2020-10-16 11:41:44,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:44,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:44,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:44,167 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 11:41:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,414 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 11:41:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:44,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 11:41:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,415 INFO L225 Difference]: With dead ends: 69 [2020-10-16 11:41:44,415 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:44,416 INFO L677 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 [2020-10-16 11:41:44,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 11:41:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:41:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 11:41:44,418 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 11:41:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,419 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 11:41:44,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 11:41:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:44,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:44,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:41:44,620 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 11:41:44,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:44,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480440861] [2020-10-16 11:41:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480440861] [2020-10-16 11:41:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447797851] [2020-10-16 11:41:44,697 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 [2020-10-16 11:41:44,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:44,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:44,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:44,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:44,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:44,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:44,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239884706] [2020-10-16 11:41:44,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:44,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:44,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:44,772 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 11:41:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:44,899 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 11:41:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:44,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:44,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:44,902 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:44,902 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:44,902 INFO L677 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 [2020-10-16 11:41:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 11:41:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:44,905 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:44,905 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:44,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:44,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:44,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 11:41:45,115 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,115 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 11:41:45,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524865072] [2020-10-16 11:41:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524865072] [2020-10-16 11:41:45,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982117659] [2020-10-16 11:41:45,190 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 [2020-10-16 11:41:45,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:45,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:45,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701788508] [2020-10-16 11:41:45,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:45,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:45,271 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:45,456 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 11:41:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:45,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:45,458 INFO L225 Difference]: With dead ends: 71 [2020-10-16 11:41:45,458 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 11:41:45,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:41:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 11:41:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 11:41:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:45,460 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:45,461 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:45,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:45,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:45,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:45,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:41:45,668 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 11:41:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:45,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888778332] [2020-10-16 11:41:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888778332] [2020-10-16 11:41:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599300474] [2020-10-16 11:41:45,737 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 [2020-10-16 11:41:45,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 11:41:45,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:45,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:45,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:45,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:45,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234004425] [2020-10-16 11:41:45,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:45,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:45,835 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,008 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 11:41:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:46,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,010 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:46,010 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:46,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:41:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 11:41:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:46,014 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 11:41:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,014 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:46,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 11:41:46,223 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 11:41:46,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78126813] [2020-10-16 11:41:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78126813] [2020-10-16 11:41:46,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487651084] [2020-10-16 11:41:46,287 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 [2020-10-16 11:41:46,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 11:41:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:46,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161198932] [2020-10-16 11:41:46,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:46,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:46,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:46,358 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 11:41:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:46,614 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 11:41:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:46,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:46,616 INFO L225 Difference]: With dead ends: 67 [2020-10-16 11:41:46,616 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:41:46,617 INFO L677 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 [2020-10-16 11:41:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:41:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 11:41:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:46,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 11:41:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:46,620 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:46,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:46,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:46,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:46,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:41:46,829 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 11:41:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879296008] [2020-10-16 11:41:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879296008] [2020-10-16 11:41:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459700563] [2020-10-16 11:41:46,898 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 [2020-10-16 11:41:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:46,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:46,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:46,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 11:41:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515654979] [2020-10-16 11:41:46,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 11:41:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 11:41:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:41:46,959 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 11:41:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,174 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:41:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:47,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 11:41:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,176 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:41:47,176 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:41:47,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:41:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 11:41:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:41:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 11:41:47,180 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 11:41:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,180 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 11:41:47,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 11:41:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 11:41:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:47,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:47,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:47,383 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 11:41:47,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:47,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823674135] [2020-10-16 11:41:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823674135] [2020-10-16 11:41:47,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009410775] [2020-10-16 11:41:47,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:47,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:47,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:47,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:47,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854514928] [2020-10-16 11:41:47,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:47,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:47,550 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 11:41:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:47,836 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-16 11:41:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:47,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:47,837 INFO L225 Difference]: With dead ends: 62 [2020-10-16 11:41:47,837 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:41:47,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:41:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:41:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-16 11:41:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 11:41:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 11:41:47,841 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 11:41:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:47,841 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 11:41:47,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 11:41:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:41:47,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:47,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 11:41:48,053 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 11:41:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:48,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234988437] [2020-10-16 11:41:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234988437] [2020-10-16 11:41:48,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754938122] [2020-10-16 11:41:48,115 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 [2020-10-16 11:41:48,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:41:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 11:41:48,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908315510] [2020-10-16 11:41:48,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:48,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:48,191 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 11:41:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:48,451 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 11:41:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:48,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 11:41:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:48,452 INFO L225 Difference]: With dead ends: 68 [2020-10-16 11:41:48,452 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 11:41:48,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:48,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 11:41:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 11:41:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:48,456 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 11:41:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:48,457 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:48,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:48,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:48,457 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:48,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 11:41:48,667 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:48,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 11:41:48,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:48,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882163414] [2020-10-16 11:41:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882163414] [2020-10-16 11:41:48,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671109375] [2020-10-16 11:41:48,742 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 [2020-10-16 11:41:48,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:48,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:48,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:48,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:48,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750747367] [2020-10-16 11:41:48,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:48,830 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 11:41:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,118 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 11:41:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:49,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,119 INFO L225 Difference]: With dead ends: 60 [2020-10-16 11:41:49,120 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 11:41:49,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 11:41:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 11:41:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 11:41:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 11:41:49,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 11:41:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,124 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 11:41:49,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 11:41:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:49,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,125 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:49,335 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 11:41:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63254037] [2020-10-16 11:41:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63254037] [2020-10-16 11:41:49,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088564054] [2020-10-16 11:41:49,415 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 [2020-10-16 11:41:49,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:49,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:49,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380555282] [2020-10-16 11:41:49,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:49,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:49,476 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 11:41:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:49,630 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 11:41:49,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 11:41:49,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:49,631 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:41:49,631 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 11:41:49,631 INFO L677 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 [2020-10-16 11:41:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 11:41:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 11:41:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 11:41:49,634 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 11:41:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:49,634 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 11:41:49,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 11:41:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:49,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:49,635 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:49,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:49,844 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 11:41:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:49,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367698188] [2020-10-16 11:41:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367698188] [2020-10-16 11:41:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375613108] [2020-10-16 11:41:49,928 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 [2020-10-16 11:41:49,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:49,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:50,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501150304] [2020-10-16 11:41:50,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:50,005 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 11:41:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,170 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 11:41:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:41:50,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,171 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:50,171 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:50,172 INFO L677 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 [2020-10-16 11:41:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 11:41:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 11:41:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 11:41:50,174 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 11:41:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,174 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 11:41:50,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 11:41:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,175 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 11:41:50,385 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 11:41:50,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316554612] [2020-10-16 11:41:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316554612] [2020-10-16 11:41:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955361365] [2020-10-16 11:41:50,460 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 [2020-10-16 11:41:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:50,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:50,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:50,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587692653] [2020-10-16 11:41:50,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:50,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:50,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:50,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:50,516 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 11:41:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:50,698 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 11:41:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:50,699 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:50,700 INFO L225 Difference]: With dead ends: 75 [2020-10-16 11:41:50,700 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:50,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 11:41:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 11:41:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 11:41:50,704 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 11:41:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:50,704 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 11:41:50,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 11:41:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:50,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:50,705 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:50,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:50,909 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 11:41:50,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:50,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683804583] [2020-10-16 11:41:50,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:50,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683804583] [2020-10-16 11:41:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432693186] [2020-10-16 11:41:50,983 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 [2020-10-16 11:41:51,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:51,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550192997] [2020-10-16 11:41:51,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:51,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:51,062 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 11:41:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:51,308 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 11:41:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:51,311 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:51,312 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:51,312 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:51,312 INFO L677 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 [2020-10-16 11:41:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 11:41:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:41:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 11:41:51,315 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 11:41:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:51,315 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 11:41:51,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 11:41:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:51,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:51,316 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:51,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 11:41:51,523 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:51,524 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 11:41:51,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:51,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661834411] [2020-10-16 11:41:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661834411] [2020-10-16 11:41:51,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244818897] [2020-10-16 11:41:51,639 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 [2020-10-16 11:41:51,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:51,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:51,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:51,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107099476] [2020-10-16 11:41:51,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:51,742 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 11:41:52,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,045 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 11:41:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:52,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,047 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:41:52,048 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:41:52,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:41:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 11:41:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:41:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 11:41:52,052 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 11:41:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,053 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 11:41:52,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 11:41:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:52,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,054 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:52,265 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 11:41:52,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173082002] [2020-10-16 11:41:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173082002] [2020-10-16 11:41:52,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093069716] [2020-10-16 11:41:52,343 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 [2020-10-16 11:41:52,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:52,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:52,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:52,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:52,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008317067] [2020-10-16 11:41:52,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:52,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:52,415 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 11:41:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:52,708 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 11:41:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:52,709 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:52,710 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:41:52,710 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 11:41:52,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:41:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 11:41:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 11:41:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:41:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 11:41:52,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 11:41:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:52,714 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 11:41:52,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 11:41:52,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:52,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:52,715 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:52,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 11:41:52,923 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:52,923 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 11:41:52,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:52,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108496554] [2020-10-16 11:41:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:52,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108496554] [2020-10-16 11:41:52,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85638151] [2020-10-16 11:41:52,984 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 [2020-10-16 11:41:53,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 11:41:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139755671] [2020-10-16 11:41:53,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:41:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:41:53,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:41:53,105 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 11:41:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:53,416 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 11:41:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:53,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 11:41:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:53,418 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:41:53,418 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:41:53,419 INFO L677 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 [2020-10-16 11:41:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:41:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 11:41:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:41:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 11:41:53,424 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 11:41:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:53,424 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 11:41:53,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:41:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 11:41:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:41:53,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:53,425 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:53,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 11:41:53,636 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:53,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:53,637 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 11:41:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:53,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848261320] [2020-10-16 11:41:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848261320] [2020-10-16 11:41:53,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386322679] [2020-10-16 11:41:53,770 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 [2020-10-16 11:41:53,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:53,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:53,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:41:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:53,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:53,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:53,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 11:41:53,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442864007] [2020-10-16 11:41:53,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:53,888 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 11:41:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,207 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 11:41:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:54,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 11:41:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,209 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:54,209 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 11:41:54,209 INFO L677 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 [2020-10-16 11:41:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 11:41:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 11:41:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:41:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 11:41:54,212 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 11:41:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,212 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 11:41:54,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 11:41:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 11:41:54,418 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,418 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 11:41:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153784228] [2020-10-16 11:41:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153784228] [2020-10-16 11:41:54,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060757697] [2020-10-16 11:41:54,503 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 [2020-10-16 11:41:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:54,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:54,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834788117] [2020-10-16 11:41:54,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:54,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:54,563 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 11:41:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:54,753 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:41:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:41:54,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:54,755 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:41:54,755 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:41:54,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:41:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:41:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 11:41:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:54,758 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:54,759 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:54,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:54,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:54,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:54,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 11:41:54,970 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:54,970 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 11:41:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:54,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336971631] [2020-10-16 11:41:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336971631] [2020-10-16 11:41:55,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755062511] [2020-10-16 11:41:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:55,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947959139] [2020-10-16 11:41:55,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:55,137 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,371 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 11:41:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:41:55,371 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,372 INFO L225 Difference]: With dead ends: 81 [2020-10-16 11:41:55,372 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 11:41:55,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:41:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 11:41:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 11:41:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:55,375 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,375 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:55,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:55,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,376 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:55,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 11:41:55,585 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 11:41:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:55,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333635927] [2020-10-16 11:41:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333635927] [2020-10-16 11:41:55,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886505075] [2020-10-16 11:41:55,682 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 [2020-10-16 11:41:55,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:55,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:55,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:55,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:55,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802395309] [2020-10-16 11:41:55,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:55,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:55,743 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:55,957 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 11:41:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:41:55,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:55,959 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:41:55,959 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:41:55,959 INFO L677 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 [2020-10-16 11:41:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:41:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 11:41:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:55,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:55,963 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:55,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:55,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:55,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 11:41:56,171 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 11:41:56,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791036628] [2020-10-16 11:41:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791036628] [2020-10-16 11:41:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733741552] [2020-10-16 11:41:56,253 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 [2020-10-16 11:41:56,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:41:56,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:56,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:56,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:56,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216171432] [2020-10-16 11:41:56,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:56,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:56,329 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:56,627 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 11:41:56,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:41:56,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:56,630 INFO L225 Difference]: With dead ends: 77 [2020-10-16 11:41:56,630 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:41:56,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:41:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:41:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 11:41:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:56,632 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:56,633 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:56,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:56,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:56,633 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:56,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 11:41:56,842 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:56,842 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 11:41:56,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:56,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431118580] [2020-10-16 11:41:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431118580] [2020-10-16 11:41:56,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224499782] [2020-10-16 11:41:56,918 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 [2020-10-16 11:41:56,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 11:41:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716284199] [2020-10-16 11:41:57,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:57,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:57,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:57,024 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:57,277 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 11:41:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:41:57,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:57,278 INFO L225 Difference]: With dead ends: 74 [2020-10-16 11:41:57,279 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:41:57,279 INFO L677 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 [2020-10-16 11:41:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:41:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 11:41:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:41:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:41:57,282 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 11:41:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:57,282 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:41:57,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:41:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:57,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:57,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:57,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:57,492 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:57,492 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 11:41:57,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:57,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590358667] [2020-10-16 11:41:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590358667] [2020-10-16 11:41:57,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235577690] [2020-10-16 11:41:57,572 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 [2020-10-16 11:41:57,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 11:41:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:57,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:57,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:57,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:57,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:57,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18538158] [2020-10-16 11:41:57,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:57,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:57,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:57,736 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 11:41:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,088 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 11:41:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:41:58,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,090 INFO L225 Difference]: With dead ends: 73 [2020-10-16 11:41:58,090 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:41:58,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:41:58,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:41:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 11:41:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:41:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:41:58,094 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 11:41:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,094 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:41:58,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:41:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 11:41:58,303 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 11:41:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422996618] [2020-10-16 11:41:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422996618] [2020-10-16 11:41:58,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723729108] [2020-10-16 11:41:58,374 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 [2020-10-16 11:41:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:58,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:58,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 11:41:58,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558972494] [2020-10-16 11:41:58,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:41:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:41:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:41:58,438 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 11:41:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:58,706 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:41:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:41:58,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 11:41:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:58,707 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:41:58,707 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:41:58,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:41:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:41:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 11:41:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:41:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 11:41:58,710 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 11:41:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:58,710 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 11:41:58,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:41:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 11:41:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:58,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:58,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:58,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:41:58,912 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 11:41:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030397566] [2020-10-16 11:41:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:58,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030397566] [2020-10-16 11:41:58,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939398535] [2020-10-16 11:41:58,978 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 [2020-10-16 11:41:59,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:41:59,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:41:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:59,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578842020] [2020-10-16 11:41:59,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:59,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:59,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:59,079 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 11:41:59,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:41:59,454 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-16 11:41:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:41:59,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:41:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:41:59,456 INFO L225 Difference]: With dead ends: 70 [2020-10-16 11:41:59,456 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 11:41:59,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:41:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 11:41:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-16 11:41:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 11:41:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 11:41:59,460 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 11:41:59,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:41:59,460 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 11:41:59,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:41:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 11:41:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:41:59,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:41:59,461 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:41:59,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 11:41:59,670 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:41:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:41:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 11:41:59,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:41:59,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835729837] [2020-10-16 11:41:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:41:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:41:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835729837] [2020-10-16 11:41:59,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311162907] [2020-10-16 11:41:59,755 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 [2020-10-16 11:41:59,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:41:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:41:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:41:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:41:59,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:41:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:41:59,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:41:59,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:41:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192834302] [2020-10-16 11:41:59,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:41:59,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:41:59,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:41:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:41:59,849 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 11:42:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,180 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 11:42:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:00,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 11:42:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,181 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:00,182 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 11:42:00,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 11:42:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 11:42:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:00,184 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 11:42:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,185 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:00,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:00,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,185 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:00,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:00,387 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 11:42:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:00,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276869223] [2020-10-16 11:42:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276869223] [2020-10-16 11:42:00,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936909624] [2020-10-16 11:42:00,471 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 [2020-10-16 11:42:00,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:00,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:00,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:00,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:00,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:00,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812490590] [2020-10-16 11:42:00,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:00,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:00,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:00,578 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 11:42:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:00,987 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 11:42:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:00,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:00,989 INFO L225 Difference]: With dead ends: 66 [2020-10-16 11:42:00,989 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 11:42:00,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 11:42:00,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 11:42:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 11:42:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 11:42:00,994 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 11:42:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:00,994 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 11:42:00,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:00,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 11:42:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:00,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:00,995 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 11:42:01,203 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 11:42:01,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250899359] [2020-10-16 11:42:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250899359] [2020-10-16 11:42:01,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292371403] [2020-10-16 11:42:01,308 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 [2020-10-16 11:42:01,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:01,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277869481] [2020-10-16 11:42:01,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:01,365 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 11:42:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:01,539 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 11:42:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 11:42:01,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:01,540 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:01,541 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 11:42:01,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:42:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 11:42:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 11:42:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 11:42:01,544 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 11:42:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:01,544 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 11:42:01,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 11:42:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:01,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:01,545 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:01,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 11:42:01,754 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 11:42:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:01,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134548453] [2020-10-16 11:42:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134548453] [2020-10-16 11:42:01,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130992249] [2020-10-16 11:42:01,872 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 [2020-10-16 11:42:01,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:01,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:01,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:01,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:01,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425854427] [2020-10-16 11:42:01,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:01,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:01,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:01,940 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 11:42:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,133 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 11:42:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 11:42:02,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,135 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:02,135 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:42:02,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:42:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:42:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 11:42:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 11:42:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 11:42:02,138 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 11:42:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,139 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 11:42:02,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 11:42:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:02,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,140 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:02,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 11:42:02,348 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 11:42:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:02,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031563012] [2020-10-16 11:42:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031563012] [2020-10-16 11:42:02,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070323643] [2020-10-16 11:42:02,487 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 [2020-10-16 11:42:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:02,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:02,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:02,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402791522] [2020-10-16 11:42:02,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:02,577 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 11:42:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:02,900 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 11:42:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:02,901 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:02,902 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:02,902 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:02,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:02,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 11:42:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 11:42:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 11:42:02,907 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 11:42:02,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:02,908 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 11:42:02,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 11:42:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:02,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:02,910 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 11:42:03,121 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 11:42:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981705978] [2020-10-16 11:42:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981705978] [2020-10-16 11:42:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779955828] [2020-10-16 11:42:03,224 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 [2020-10-16 11:42:03,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:03,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:03,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491753951] [2020-10-16 11:42:03,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:03,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:03,298 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 11:42:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:03,580 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 11:42:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:03,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:03,584 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:03,584 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:03,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 11:42:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 11:42:03,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 11:42:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:03,587 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 11:42:03,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 11:42:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:03,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:03,587 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:03,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:03,797 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:03,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 11:42:03,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:03,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848159434] [2020-10-16 11:42:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848159434] [2020-10-16 11:42:03,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130053987] [2020-10-16 11:42:03,894 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 [2020-10-16 11:42:03,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:03,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:03,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:03,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:03,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:03,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:03,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284994749] [2020-10-16 11:42:03,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:03,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:03,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:03,951 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 11:42:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,222 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 11:42:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:04,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,223 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:04,224 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:04,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 11:42:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:42:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 11:42:04,226 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 11:42:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,226 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 11:42:04,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 11:42:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:04,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:04,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:04,434 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:04,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 11:42:04,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:04,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489483382] [2020-10-16 11:42:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489483382] [2020-10-16 11:42:04,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639819380] [2020-10-16 11:42:04,537 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 [2020-10-16 11:42:04,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:04,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:04,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:04,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:04,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427592091] [2020-10-16 11:42:04,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:04,630 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 11:42:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:04,935 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 11:42:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:04,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:04,937 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:04,937 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:04,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 11:42:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 11:42:04,941 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 11:42:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:04,942 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 11:42:04,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 11:42:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:04,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:04,943 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 11:42:05,153 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 11:42:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567751087] [2020-10-16 11:42:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567751087] [2020-10-16 11:42:05,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204076800] [2020-10-16 11:42:05,265 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 [2020-10-16 11:42:05,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:05,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126902468] [2020-10-16 11:42:05,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:05,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:05,373 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 11:42:05,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:05,643 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 11:42:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:05,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:05,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:05,644 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:05,644 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:05,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 11:42:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 11:42:05,647 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 11:42:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:05,647 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 11:42:05,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 11:42:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:05,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:05,648 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:05,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:05,853 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 11:42:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:05,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853509202] [2020-10-16 11:42:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:05,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853509202] [2020-10-16 11:42:05,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078641065] [2020-10-16 11:42:05,944 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 [2020-10-16 11:42:05,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:05,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093043384] [2020-10-16 11:42:06,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:06,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:06,028 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 11:42:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:06,440 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 11:42:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:06,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:06,441 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:06,442 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:06,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 11:42:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 11:42:06,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 11:42:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:06,446 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 11:42:06,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 11:42:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:06,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:06,447 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:06,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 11:42:06,648 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 11:42:06,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:06,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661181565] [2020-10-16 11:42:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661181565] [2020-10-16 11:42:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905879985] [2020-10-16 11:42:06,721 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 [2020-10-16 11:42:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:06,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:06,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 11:42:06,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407061747] [2020-10-16 11:42:06,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 11:42:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:06,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 11:42:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 11:42:06,789 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 11:42:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,137 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:07,137 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 11:42:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,139 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:07,139 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:07,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:07,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 11:42:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 11:42:07,142 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 11:42:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,143 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 11:42:07,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 11:42:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 11:42:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:42:07,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,143 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:07,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 11:42:07,353 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 11:42:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:07,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181758857] [2020-10-16 11:42:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181758857] [2020-10-16 11:42:07,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730234345] [2020-10-16 11:42:07,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:42:07,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:07,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 11:42:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:07,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:07,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:07,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:42:07,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568213558] [2020-10-16 11:42:07,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:07,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:07,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:07,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:07,553 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 11:42:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:07,979 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 11:42:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:07,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 11:42:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:07,981 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:07,981 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:07,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 11:42:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 11:42:07,983 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 11:42:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:07,983 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 11:42:07,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 11:42:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:07,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:07,984 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 11:42:08,187 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 11:42:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827521310] [2020-10-16 11:42:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827521310] [2020-10-16 11:42:08,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82840789] [2020-10-16 11:42:08,299 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 [2020-10-16 11:42:08,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:08,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:08,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171945472] [2020-10-16 11:42:08,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:08,358 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 11:42:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:08,622 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:08,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:08,624 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:08,624 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:08,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:42:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 11:42:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:08,627 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:08,628 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:08,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:08,629 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:08,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 11:42:08,838 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 11:42:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:08,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351480539] [2020-10-16 11:42:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:08,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351480539] [2020-10-16 11:42:08,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937085325] [2020-10-16 11:42:08,956 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 [2020-10-16 11:42:08,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:08,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:09,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450622509] [2020-10-16 11:42:09,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:09,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:09,032 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,316 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 11:42:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:09,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,320 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:09,320 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:09,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:42:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:09,322 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,322 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:09,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:09,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:09,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 11:42:09,524 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 11:42:09,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:09,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480837773] [2020-10-16 11:42:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480837773] [2020-10-16 11:42:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247848042] [2020-10-16 11:42:09,626 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 [2020-10-16 11:42:09,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:09,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:09,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:09,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993294720] [2020-10-16 11:42:09,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:09,682 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:09,933 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 11:42:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:09,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:09,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:09,935 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:42:09,935 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 11:42:09,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:42:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 11:42:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 11:42:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:09,937 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:09,938 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:09,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:09,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:09,939 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:10,146 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 11:42:10,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476143587] [2020-10-16 11:42:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476143587] [2020-10-16 11:42:10,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959356923] [2020-10-16 11:42:10,255 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 [2020-10-16 11:42:10,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:10,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:10,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:10,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:10,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216993610] [2020-10-16 11:42:10,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:10,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:10,339 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:10,697 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 11:42:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:10,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:10,698 INFO L225 Difference]: With dead ends: 87 [2020-10-16 11:42:10,698 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 11:42:10,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 11:42:10,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 11:42:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:10,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:10,701 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:10,701 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:10,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:10,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:10,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:10,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:10,910 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:10,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 11:42:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:10,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540169303] [2020-10-16 11:42:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540169303] [2020-10-16 11:42:11,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912422256] [2020-10-16 11:42:11,011 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 [2020-10-16 11:42:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:11,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:11,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653952262] [2020-10-16 11:42:11,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:11,080 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:11,385 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 11:42:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:11,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:11,386 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:11,387 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:11,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 11:42:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:11,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:11,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:11,390 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:11,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:11,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:11,390 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:11,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 11:42:11,592 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 11:42:11,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:11,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733453317] [2020-10-16 11:42:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733453317] [2020-10-16 11:42:11,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208231541] [2020-10-16 11:42:11,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-16 11:42:11,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:11,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:11,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:11,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:11,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:11,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393840175] [2020-10-16 11:42:11,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:11,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:11,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:11,767 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:12,171 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 11:42:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:12,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:12,172 INFO L225 Difference]: With dead ends: 83 [2020-10-16 11:42:12,172 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 11:42:12,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 11:42:12,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 11:42:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:12,175 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:12,176 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:12,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:12,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:12,176 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:12,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:12,377 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 11:42:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:12,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913093966] [2020-10-16 11:42:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913093966] [2020-10-16 11:42:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456151660] [2020-10-16 11:42:12,480 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 [2020-10-16 11:42:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:42:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:12,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:12,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010028917] [2020-10-16 11:42:12,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:12,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:12,537 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:12,886 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 11:42:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:12,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:12,888 INFO L225 Difference]: With dead ends: 80 [2020-10-16 11:42:12,888 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:12,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 11:42:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:12,892 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 11:42:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:12,892 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:12,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:12,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:12,893 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:13,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 11:42:13,095 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:13,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:13,095 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 11:42:13,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:13,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366095300] [2020-10-16 11:42:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366095300] [2020-10-16 11:42:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771434774] [2020-10-16 11:42:13,194 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 [2020-10-16 11:42:13,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:13,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:13,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:13,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:13,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:13,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:13,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132420167] [2020-10-16 11:42:13,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:13,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:13,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:13,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:13,274 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 11:42:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:13,750 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 11:42:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:13,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:13,753 INFO L225 Difference]: With dead ends: 79 [2020-10-16 11:42:13,753 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:13,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 11:42:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:13,755 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 11:42:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:13,755 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:13,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:13,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:13,756 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:13,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:13,958 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:13,958 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 11:42:13,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:13,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28574929] [2020-10-16 11:42:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28574929] [2020-10-16 11:42:14,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496973581] [2020-10-16 11:42:14,041 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 [2020-10-16 11:42:14,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:42:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:14,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 11:42:14,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845189103] [2020-10-16 11:42:14,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:42:14,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:14,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:42:14,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:42:14,108 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 11:42:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:14,496 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:42:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:14,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 11:42:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:14,498 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:14,498 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:14,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 11:42:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 11:42:14,501 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 11:42:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:14,501 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 11:42:14,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:42:14,501 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 11:42:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:14,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:14,502 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:14,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 11:42:14,704 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 11:42:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:14,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183019006] [2020-10-16 11:42:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183019006] [2020-10-16 11:42:14,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817910266] [2020-10-16 11:42:14,795 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 [2020-10-16 11:42:14,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 11:42:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:14,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:14,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:14,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274632321] [2020-10-16 11:42:14,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:14,870 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 11:42:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:15,391 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 11:42:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:15,392 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:15,393 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:42:15,393 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 11:42:15,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 11:42:15,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 11:42:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:42:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 11:42:15,396 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 11:42:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:15,396 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 11:42:15,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 11:42:15,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 11:42:15,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:15,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:15,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:15,605 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 11:42:15,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:15,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486869922] [2020-10-16 11:42:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486869922] [2020-10-16 11:42:15,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352238725] [2020-10-16 11:42:15,696 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 [2020-10-16 11:42:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:42:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:15,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:15,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:15,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 11:42:15,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014484855] [2020-10-16 11:42:15,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:15,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:15,809 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 11:42:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:16,246 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 11:42:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:16,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 11:42:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:16,248 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:16,248 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:16,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 11:42:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:16,251 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 11:42:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:16,251 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:16,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:16,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:16,252 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:16,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 11:42:16,453 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 11:42:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:16,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947851339] [2020-10-16 11:42:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947851339] [2020-10-16 11:42:16,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155605281] [2020-10-16 11:42:16,552 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 [2020-10-16 11:42:16,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:16,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:16,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:16,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:16,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539978562] [2020-10-16 11:42:16,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:16,638 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 11:42:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:17,147 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 11:42:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:17,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:17,148 INFO L225 Difference]: With dead ends: 72 [2020-10-16 11:42:17,148 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 11:42:17,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 11:42:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 11:42:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 11:42:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 11:42:17,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 11:42:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:17,151 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 11:42:17,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 11:42:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:17,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:17,152 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 11:42:17,353 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 11:42:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774846797] [2020-10-16 11:42:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774846797] [2020-10-16 11:42:17,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178918583] [2020-10-16 11:42:17,494 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 [2020-10-16 11:42:17,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:17,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:17,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:17,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875885532] [2020-10-16 11:42:17,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:17,551 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 11:42:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:17,774 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 11:42:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:42:17,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:17,775 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:17,775 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 11:42:17,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 11:42:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 11:42:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 11:42:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 11:42:17,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 11:42:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:17,777 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 11:42:17,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 11:42:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:17,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:17,778 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:17,979 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:17,980 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 11:42:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:17,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644140835] [2020-10-16 11:42:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644140835] [2020-10-16 11:42:18,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599043172] [2020-10-16 11:42:18,119 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:18,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:18,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480691503] [2020-10-16 11:42:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:18,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:18,182 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 11:42:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:18,453 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 11:42:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:42:18,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:18,454 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:18,454 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:18,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-16 11:42:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 11:42:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 11:42:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 11:42:18,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 11:42:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:18,457 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 11:42:18,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 11:42:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:18,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:18,458 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:18,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,667 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 11:42:18,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:18,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526168276] [2020-10-16 11:42:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526168276] [2020-10-16 11:42:18,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789896624] [2020-10-16 11:42:18,797 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:18,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:18,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:18,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:18,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608286216] [2020-10-16 11:42:18,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:18,865 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 11:42:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:19,125 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 11:42:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:19,126 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:19,127 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:42:19,127 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:19,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 11:42:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 11:42:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 11:42:19,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 11:42:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:19,130 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 11:42:19,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 11:42:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:19,131 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:19,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:19,332 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 11:42:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315690912] [2020-10-16 11:42:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315690912] [2020-10-16 11:42:19,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98458779] [2020-10-16 11:42:19,481 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:19,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:19,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:19,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189140630] [2020-10-16 11:42:19,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:19,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:19,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:19,598 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 11:42:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,062 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 11:42:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:20,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:20,064 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:20,064 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:20,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:20,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 11:42:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:42:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 11:42:20,068 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 11:42:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:20,068 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 11:42:20,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 11:42:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:20,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:20,069 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,279 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 11:42:20,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448270231] [2020-10-16 11:42:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448270231] [2020-10-16 11:42:20,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924361713] [2020-10-16 11:42:20,397 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:20,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:20,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:20,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:20,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635862825] [2020-10-16 11:42:20,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:20,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:20,453 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 11:42:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:20,791 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:20,792 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:20,793 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:20,793 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:20,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 11:42:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:42:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 11:42:20,796 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 11:42:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:20,796 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 11:42:20,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 11:42:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:20,796 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:20,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 11:42:20,997 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 11:42:20,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:20,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492275660] [2020-10-16 11:42:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492275660] [2020-10-16 11:42:21,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786378743] [2020-10-16 11:42:21,109 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:21,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879183654] [2020-10-16 11:42:21,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:21,179 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 11:42:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:21,580 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 11:42:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:21,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:21,581 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:42:21,581 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:42:21,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:42:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 11:42:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 11:42:21,585 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 11:42:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:21,585 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 11:42:21,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 11:42:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:21,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:21,586 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:21,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,794 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 11:42:21,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:21,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198350728] [2020-10-16 11:42:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198350728] [2020-10-16 11:42:21,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12226527] [2020-10-16 11:42:21,903 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:21,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:21,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:21,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:21,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:21,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692115178] [2020-10-16 11:42:21,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:21,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:21,964 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 11:42:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:22,343 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 11:42:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:22,343 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:22,344 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:22,344 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:22,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 11:42:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 11:42:22,348 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 11:42:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:22,348 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 11:42:22,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 11:42:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:22,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:22,348 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:22,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 11:42:22,549 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 11:42:22,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:22,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645832085] [2020-10-16 11:42:22,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645832085] [2020-10-16 11:42:22,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791974035] [2020-10-16 11:42:22,654 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:22,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:22,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:22,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:22,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:22,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950526822] [2020-10-16 11:42:22,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:22,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:22,771 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 11:42:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,204 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 11:42:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:23,205 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:23,206 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:23,206 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:23,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 11:42:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 11:42:23,208 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 11:42:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:23,209 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 11:42:23,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 11:42:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:23,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:23,209 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:23,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:23,416 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 11:42:23,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:23,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500830323] [2020-10-16 11:42:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500830323] [2020-10-16 11:42:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232358157] [2020-10-16 11:42:23,521 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:23,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:23,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:23,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:23,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673156114] [2020-10-16 11:42:23,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:23,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:23,589 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 11:42:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:23,999 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 11:42:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:24,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,000 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:42:24,001 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:42:24,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:42:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 11:42:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 11:42:24,003 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 11:42:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,003 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 11:42:24,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 11:42:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:24,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,004 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:24,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 11:42:24,205 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 11:42:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:24,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799713512] [2020-10-16 11:42:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799713512] [2020-10-16 11:42:24,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194614131] [2020-10-16 11:42:24,314 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:24,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:24,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211040378] [2020-10-16 11:42:24,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:24,408 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 11:42:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:24,932 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 11:42:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:24,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:24,934 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:24,934 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:42:24,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:42:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 11:42:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 11:42:24,937 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 11:42:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:24,937 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 11:42:24,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 11:42:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:24,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:24,938 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:25,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:25,145 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 11:42:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:25,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076058691] [2020-10-16 11:42:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076058691] [2020-10-16 11:42:25,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671921719] [2020-10-16 11:42:25,247 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:25,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:25,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 11:42:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661147610] [2020-10-16 11:42:25,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:42:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:42:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:42:25,303 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 11:42:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:25,757 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 11:42:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:25,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 11:42:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:25,759 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:42:25,759 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:42:25,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:42:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 11:42:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 11:42:25,762 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 11:42:25,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:25,762 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 11:42:25,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:42:25,762 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 11:42:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:42:25,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:25,763 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:25,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:25,971 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 11:42:25,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:25,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42861431] [2020-10-16 11:42:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42861431] [2020-10-16 11:42:26,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148595599] [2020-10-16 11:42:26,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:26,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:42:26,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:26,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:26,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:26,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:42:26,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959589580] [2020-10-16 11:42:26,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:26,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:26,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:26,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:26,153 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 11:42:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:26,714 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 11:42:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:26,714 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 11:42:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:26,715 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:26,715 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:42:26,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:42:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 11:42:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 11:42:26,717 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 11:42:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:26,717 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 11:42:26,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:26,717 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 11:42:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:26,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:26,718 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:26,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:26,919 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 11:42:26,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:26,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837370676] [2020-10-16 11:42:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837370676] [2020-10-16 11:42:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757537441] [2020-10-16 11:42:27,068 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67188443] [2020-10-16 11:42:27,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:27,125 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 11:42:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:27,394 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 11:42:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:27,395 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:27,396 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:27,396 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:27,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 11:42:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 11:42:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:27,398 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:27,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:27,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:27,399 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:27,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,608 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 11:42:27,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:27,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542174708] [2020-10-16 11:42:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542174708] [2020-10-16 11:42:27,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541785307] [2020-10-16 11:42:27,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:27,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:27,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:27,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:27,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:27,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560999716] [2020-10-16 11:42:27,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:27,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:27,840 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:28,186 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 11:42:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:28,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:28,188 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:28,188 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:28,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 11:42:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:28,191 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:28,191 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:28,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:28,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:28,191 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:28,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,392 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 11:42:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:28,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455126545] [2020-10-16 11:42:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455126545] [2020-10-16 11:42:28,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930921439] [2020-10-16 11:42:28,533 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:28,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:28,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:28,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:28,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:28,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644388102] [2020-10-16 11:42:28,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:28,589 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:28,902 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 11:42:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:28,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:28,904 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:28,904 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:28,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 11:42:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 11:42:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:28,906 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:28,907 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:28,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:28,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:28,908 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:29,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,110 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 11:42:29,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:29,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307351426] [2020-10-16 11:42:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307351426] [2020-10-16 11:42:29,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67117837] [2020-10-16 11:42:29,241 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:29,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:29,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:29,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:29,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403849223] [2020-10-16 11:42:29,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:29,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:29,322 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:29,713 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 11:42:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:29,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:29,714 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:42:29,715 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:42:29,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:42:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:42:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 11:42:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:29,718 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:29,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:29,719 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:29,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:29,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:29,719 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:29,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:29,923 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 11:42:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:29,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92381481] [2020-10-16 11:42:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92381481] [2020-10-16 11:42:30,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057185988] [2020-10-16 11:42:30,060 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:30,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380331891] [2020-10-16 11:42:30,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:30,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:30,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:30,117 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:30,485 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 11:42:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:30,486 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:30,487 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:42:30,487 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:42:30,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:42:30,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 11:42:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:30,489 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:30,490 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:30,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:30,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:30,490 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:30,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 11:42:30,697 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 11:42:30,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:30,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312615167] [2020-10-16 11:42:30,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312615167] [2020-10-16 11:42:30,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256324382] [2020-10-16 11:42:30,829 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:30,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:30,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:30,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:30,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:30,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623597058] [2020-10-16 11:42:30,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:30,912 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:31,408 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 11:42:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:31,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:31,410 INFO L225 Difference]: With dead ends: 93 [2020-10-16 11:42:31,410 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:31,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 11:42:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:31,413 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:31,413 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:31,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:31,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:31,414 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:31,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:31,615 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 11:42:31,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:31,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854479931] [2020-10-16 11:42:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854479931] [2020-10-16 11:42:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529700370] [2020-10-16 11:42:31,741 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:31,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:31,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:31,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:31,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588651568] [2020-10-16 11:42:31,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:31,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:31,799 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:32,208 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 11:42:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:32,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:32,210 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:42:32,210 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:42:32,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:42:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 11:42:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:32,213 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:32,213 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:32,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:32,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:32,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 11:42:32,415 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 11:42:32,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:32,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671040379] [2020-10-16 11:42:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671040379] [2020-10-16 11:42:32,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413296891] [2020-10-16 11:42:32,542 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:32,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:32,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:32,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:32,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:32,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:32,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:32,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:32,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12120608] [2020-10-16 11:42:32,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:32,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:32,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:32,620 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:33,184 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 11:42:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:33,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:33,186 INFO L225 Difference]: With dead ends: 89 [2020-10-16 11:42:33,186 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 11:42:33,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:33,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 11:42:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 11:42:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:33,189 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:33,189 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:33,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:33,190 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:33,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:33,399 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 11:42:33,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:33,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754433184] [2020-10-16 11:42:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754433184] [2020-10-16 11:42:33,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924831908] [2020-10-16 11:42:33,520 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:33,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:42:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:33,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:33,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:33,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:33,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666157120] [2020-10-16 11:42:33,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:33,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:33,600 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:34,064 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 11:42:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:34,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:34,066 INFO L225 Difference]: With dead ends: 86 [2020-10-16 11:42:34,066 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:42:34,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:42:34,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 11:42:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:34,070 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 11:42:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:34,070 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:34,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:34,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:34,071 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:34,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,279 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 11:42:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:34,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562047752] [2020-10-16 11:42:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562047752] [2020-10-16 11:42:34,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940326010] [2020-10-16 11:42:34,401 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:34,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:42:34,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:34,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:34,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:34,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:34,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85098501] [2020-10-16 11:42:34,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:34,481 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 11:42:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:35,112 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 11:42:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:35,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:35,113 INFO L225 Difference]: With dead ends: 85 [2020-10-16 11:42:35,113 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:42:35,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:42:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 11:42:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:35,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 11:42:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:35,116 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:35,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:35,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:35,117 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:35,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:35,318 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 11:42:35,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:35,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216246005] [2020-10-16 11:42:35,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216246005] [2020-10-16 11:42:35,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238575112] [2020-10-16 11:42:35,434 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:35,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:35,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 11:42:35,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737369947] [2020-10-16 11:42:35,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 11:42:35,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 11:42:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 11:42:35,495 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 11:42:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:36,009 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:42:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:36,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 11:42:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:36,011 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:36,011 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:42:36,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:42:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 11:42:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:42:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 11:42:36,014 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 11:42:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:36,015 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 11:42:36,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 11:42:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 11:42:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:36,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:36,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:36,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,224 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:36,224 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 11:42:36,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:36,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748082456] [2020-10-16 11:42:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748082456] [2020-10-16 11:42:36,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342079816] [2020-10-16 11:42:36,338 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:36,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:36,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:36,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:36,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552217602] [2020-10-16 11:42:36,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:36,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:36,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:36,412 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 11:42:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:37,075 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-16 11:42:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:42:37,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:37,076 INFO L225 Difference]: With dead ends: 82 [2020-10-16 11:42:37,076 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 11:42:37,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 11:42:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-16 11:42:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 11:42:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 11:42:37,079 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 11:42:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:37,079 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 11:42:37,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 11:42:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 11:42:37,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:37,080 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:37,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,280 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 11:42:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:37,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865976980] [2020-10-16 11:42:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865976980] [2020-10-16 11:42:37,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721842683] [2020-10-16 11:42:37,394 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:37,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:42:37,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:37,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:42:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:37,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:37,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:37,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 11:42:37,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443630464] [2020-10-16 11:42:37,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:37,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:37,474 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 11:42:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:38,084 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:42:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:38,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 11:42:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:38,085 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:42:38,085 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 11:42:38,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 11:42:38,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 11:42:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:38,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:38,088 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 11:42:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:38,088 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:38,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:38,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:38,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:38,089 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:38,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,290 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 11:42:38,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:38,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116139790] [2020-10-16 11:42:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116139790] [2020-10-16 11:42:38,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816808281] [2020-10-16 11:42:38,422 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:38,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:38,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:38,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:38,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:42:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:38,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:38,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047819424] [2020-10-16 11:42:38,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:38,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:38,504 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 11:42:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:39,169 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 11:42:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:39,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:39,171 INFO L225 Difference]: With dead ends: 78 [2020-10-16 11:42:39,171 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 11:42:39,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 11:42:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 11:42:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 11:42:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 11:42:39,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 11:42:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:39,174 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 11:42:39,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 11:42:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:39,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:39,175 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:39,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 11:42:39,377 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 11:42:39,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:39,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096431048] [2020-10-16 11:42:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096431048] [2020-10-16 11:42:39,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055224487] [2020-10-16 11:42:39,544 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:39,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:39,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:39,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:39,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135096211] [2020-10-16 11:42:39,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:39,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:39,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:39,609 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 11:42:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:39,878 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 11:42:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 11:42:39,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:39,879 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:42:39,879 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 11:42:39,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:42:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 11:42:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 11:42:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 11:42:39,882 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 11:42:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:39,882 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 11:42:39,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 11:42:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:39,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:39,883 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:40,084 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,084 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 11:42:40,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948400430] [2020-10-16 11:42:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948400430] [2020-10-16 11:42:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527351649] [2020-10-16 11:42:40,262 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:40,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:40,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:40,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:40,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378457310] [2020-10-16 11:42:40,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:40,335 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 11:42:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:40,664 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 11:42:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:42:40,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:40,666 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:42:40,666 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:42:40,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:42:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:42:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 11:42:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 11:42:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 11:42:40,668 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 11:42:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:40,669 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 11:42:40,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 11:42:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:40,669 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:40,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 11:42:40,870 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 11:42:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:40,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261246545] [2020-10-16 11:42:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261246545] [2020-10-16 11:42:41,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93111055] [2020-10-16 11:42:41,045 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:41,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:41,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:41,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617058825] [2020-10-16 11:42:41,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:41,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:41,102 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 11:42:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:41,450 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 11:42:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:41,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:41,452 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:41,452 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:41,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 11:42:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 11:42:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 11:42:41,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 11:42:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:41,456 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 11:42:41,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 11:42:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:41,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:41,456 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:41,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,657 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:41,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 11:42:41,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:41,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324817518] [2020-10-16 11:42:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324817518] [2020-10-16 11:42:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215572698] [2020-10-16 11:42:41,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:41,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:41,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:41,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:41,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:41,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18224439] [2020-10-16 11:42:41,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:41,899 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 11:42:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:42,298 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 11:42:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:42,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:42,300 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:42,300 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:42,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 11:42:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:42:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 11:42:42,303 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 11:42:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:42,304 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 11:42:42,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 11:42:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:42,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:42,304 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:42,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:42,512 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 11:42:42,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:42,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69517043] [2020-10-16 11:42:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69517043] [2020-10-16 11:42:42,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544507962] [2020-10-16 11:42:42,672 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:42,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:42,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:42,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:42,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:42,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114955801] [2020-10-16 11:42:42,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:42,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:42,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:42,732 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 11:42:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:43,136 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 11:42:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:43,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:43,138 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:42:43,138 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:42:43,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:42:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 11:42:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:42:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 11:42:43,141 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 11:42:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:43,142 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 11:42:43,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 11:42:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:43,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:43,142 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:43,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 11:42:43,347 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 11:42:43,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:43,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331420715] [2020-10-16 11:42:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331420715] [2020-10-16 11:42:43,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542603384] [2020-10-16 11:42:43,513 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:43,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:43,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:43,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:43,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903910107] [2020-10-16 11:42:43,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:43,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:43,587 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 11:42:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:44,183 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 11:42:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:44,184 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:44,185 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:42:44,185 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:42:44,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:42:44,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:42:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:42:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 11:42:44,189 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 11:42:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:44,190 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 11:42:44,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 11:42:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:44,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:44,191 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:44,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 11:42:44,392 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:44,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 11:42:44,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:44,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249938399] [2020-10-16 11:42:44,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249938399] [2020-10-16 11:42:44,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026723688] [2020-10-16 11:42:44,561 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:44,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:44,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:44,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:44,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:44,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400973915] [2020-10-16 11:42:44,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:44,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:44,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:44,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:44,625 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 11:42:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:45,074 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 11:42:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:45,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:45,075 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:42:45,075 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:42:45,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:42:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:42:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:42:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 11:42:45,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 11:42:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:45,078 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 11:42:45,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 11:42:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:45,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:45,081 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:45,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,289 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:45,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 11:42:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:45,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884219159] [2020-10-16 11:42:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884219159] [2020-10-16 11:42:45,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035184538] [2020-10-16 11:42:45,441 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:45,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:45,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:45,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:45,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:45,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003264544] [2020-10-16 11:42:45,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:45,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:45,521 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 11:42:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:46,071 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 11:42:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:46,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:46,073 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:46,073 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:46,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 11:42:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:42:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 11:42:46,076 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 11:42:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:46,076 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 11:42:46,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 11:42:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:46,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:46,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:46,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 11:42:46,283 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 11:42:46,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:46,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780482280] [2020-10-16 11:42:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780482280] [2020-10-16 11:42:46,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831766850] [2020-10-16 11:42:46,426 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:46,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:46,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:46,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137444496] [2020-10-16 11:42:46,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:46,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:46,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:46,491 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 11:42:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:46,989 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 11:42:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:42:46,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:46,990 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:42:46,991 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:42:46,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:42:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 11:42:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:42:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 11:42:46,994 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 11:42:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:46,994 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 11:42:46,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 11:42:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:46,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:46,995 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:47,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:47,200 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 11:42:47,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:47,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276671394] [2020-10-16 11:42:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276671394] [2020-10-16 11:42:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874033007] [2020-10-16 11:42:47,345 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:47,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:47,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:47,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:47,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:47,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:47,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616720709] [2020-10-16 11:42:47,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:47,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:47,419 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 11:42:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:48,037 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 11:42:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:48,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:48,038 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:42:48,038 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:42:48,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:42:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:42:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 11:42:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:42:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 11:42:48,041 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 11:42:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:48,041 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 11:42:48,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 11:42:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:48,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:48,041 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:48,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 11:42:48,248 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 11:42:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060949804] [2020-10-16 11:42:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060949804] [2020-10-16 11:42:48,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394006059] [2020-10-16 11:42:48,383 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:48,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:48,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:48,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314355337] [2020-10-16 11:42:48,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:48,450 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 11:42:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:48,983 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 11:42:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:42:48,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:48,984 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:42:48,984 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:42:48,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:42:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 11:42:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:42:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 11:42:48,987 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 11:42:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:48,987 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 11:42:48,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 11:42:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:48,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:48,987 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:49,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:49,188 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 11:42:49,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:49,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054914056] [2020-10-16 11:42:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054914056] [2020-10-16 11:42:49,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366500321] [2020-10-16 11:42:49,324 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:49,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:49,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:49,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:49,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:49,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:49,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721998647] [2020-10-16 11:42:49,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:49,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:49,399 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 11:42:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:50,085 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 11:42:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:42:50,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:50,086 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:42:50,086 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:42:50,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:42:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:42:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 11:42:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:42:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 11:42:50,090 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 11:42:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:50,090 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 11:42:50,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 11:42:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:50,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:50,091 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:50,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 11:42:50,295 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 11:42:50,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:50,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932508481] [2020-10-16 11:42:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932508481] [2020-10-16 11:42:50,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204996641] [2020-10-16 11:42:50,424 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:50,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:50,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:50,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:50,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:50,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 11:42:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988255005] [2020-10-16 11:42:50,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:42:50,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:42:50,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:42:50,502 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 11:42:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:51,082 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:42:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:42:51,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 11:42:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:51,083 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:42:51,083 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:42:51,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:42:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:42:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 11:42:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:42:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 11:42:51,086 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 11:42:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:51,087 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 11:42:51,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:42:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 11:42:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:42:51,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:51,087 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:51,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 11:42:51,288 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:51,289 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 11:42:51,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:51,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785608180] [2020-10-16 11:42:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785608180] [2020-10-16 11:42:51,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109672837] [2020-10-16 11:42:51,437 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:51,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:51,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 11:42:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:51,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:51,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:51,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 11:42:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466947141] [2020-10-16 11:42:51,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:51,565 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 11:42:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:52,285 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 11:42:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:42:52,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 11:42:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:52,286 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:42:52,286 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:52,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:42:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 11:42:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:42:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 11:42:52,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 11:42:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:52,289 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 11:42:52,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 11:42:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:52,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:52,289 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:52,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:52,490 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 11:42:52,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:52,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518938615] [2020-10-16 11:42:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518938615] [2020-10-16 11:42:52,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879474007] [2020-10-16 11:42:52,686 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:52,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:52,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:52,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:52,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668027241] [2020-10-16 11:42:52,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:52,741 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 11:42:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:53,086 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 11:42:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:42:53,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:53,087 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:42:53,088 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:42:53,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 11:42:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:42:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 11:42:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:53,090 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:53,090 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:53,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:53,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:53,091 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:53,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,295 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 11:42:53,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:53,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473961516] [2020-10-16 11:42:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473961516] [2020-10-16 11:42:53,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955134686] [2020-10-16 11:42:53,500 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:53,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:53,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:53,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:53,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:42:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659598208] [2020-10-16 11:42:53,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:42:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:42:53,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:42:53,574 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:42:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:53,996 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 11:42:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:42:53,997 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:42:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:53,997 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:42:53,997 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:42:53,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:42:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:42:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 11:42:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:42:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:42:54,001 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:42:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:54,001 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:42:54,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:42:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:42:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:54,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:54,002 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:54,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 11:42:54,209 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:54,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 11:42:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:54,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617341208] [2020-10-16 11:42:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617341208] [2020-10-16 11:42:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122355064] [2020-10-16 11:42:54,390 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:54,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:42:54,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:54,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:54,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:54,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058220846] [2020-10-16 11:42:54,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:54,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:54,449 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:42:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:54,847 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 11:42:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:42:54,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:54,848 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:42:54,849 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:42:54,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:42:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:42:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 11:42:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:54,851 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:54,851 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:54,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:54,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:54,851 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:55,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:55,060 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 11:42:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:55,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037008492] [2020-10-16 11:42:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037008492] [2020-10-16 11:42:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028845780] [2020-10-16 11:42:55,246 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:55,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:42:55,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:55,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:55,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:55,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:42:55,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359983682] [2020-10-16 11:42:55,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:42:55,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:55,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:42:55,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:42:55,318 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:42:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:55,799 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 11:42:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:42:55,799 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:42:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:55,800 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:42:55,800 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:42:55,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:42:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:42:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 11:42:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:42:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:42:55,803 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:42:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:55,803 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:42:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:42:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:42:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:55,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:55,804 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:56,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 11:42:56,005 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:56,005 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 11:42:56,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:56,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117965888] [2020-10-16 11:42:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117965888] [2020-10-16 11:42:56,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651009533] [2020-10-16 11:42:56,183 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:56,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:42:56,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:56,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:56,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:56,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:56,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598079466] [2020-10-16 11:42:56,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:56,241 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:42:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:56,685 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 11:42:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:42:56,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:56,686 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:42:56,686 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:42:56,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:42:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:42:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 11:42:56,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:56,690 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:56,690 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:56,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:56,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:56,691 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:56,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 11:42:56,900 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:56,900 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 11:42:56,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:56,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770312075] [2020-10-16 11:42:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770312075] [2020-10-16 11:42:57,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011632469] [2020-10-16 11:42:57,074 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:57,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:42:57,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:57,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:57,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:42:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499909945] [2020-10-16 11:42:57,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:42:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:42:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:42:57,157 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:42:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:57,732 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 11:42:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:42:57,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:42:57,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:57,733 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:42:57,733 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:42:57,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:42:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:42:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 11:42:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:42:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:42:57,736 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:42:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:57,736 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:42:57,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:42:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:42:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:57,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:57,737 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:57,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 11:42:57,947 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 11:42:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761577988] [2020-10-16 11:42:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761577988] [2020-10-16 11:42:58,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53096498] [2020-10-16 11:42:58,097 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:58,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:58,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:42:58,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822150626] [2020-10-16 11:42:58,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:42:58,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:42:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:42:58,160 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:42:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:58,676 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 11:42:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:42:58,677 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:42:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:58,677 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:42:58,677 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 11:42:58,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:42:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 11:42:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 11:42:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:42:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:42:58,680 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:42:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:58,680 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:42:58,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:42:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:42:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:58,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:58,681 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:58,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:58,882 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:58,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:58,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 11:42:58,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:58,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988120964] [2020-10-16 11:42:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:42:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988120964] [2020-10-16 11:42:59,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679744970] [2020-10-16 11:42:59,039 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:42:59,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:42:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:42:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:42:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:42:59,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:42:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:42:59,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:42:59,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:42:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412016318] [2020-10-16 11:42:59,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:42:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:42:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:42:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:42:59,120 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:42:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:42:59,776 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 11:42:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:42:59,777 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:42:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:42:59,777 INFO L225 Difference]: With dead ends: 99 [2020-10-16 11:42:59,778 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 11:42:59,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:42:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 11:42:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 11:42:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:42:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:42:59,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:42:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:42:59,781 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:42:59,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:42:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:42:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:42:59,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:42:59,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:42:59,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 11:42:59,988 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:42:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:42:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 11:42:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:42:59,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929204661] [2020-10-16 11:42:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:42:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929204661] [2020-10-16 11:43:00,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039767253] [2020-10-16 11:43:00,145 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:00,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:00,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374348339] [2020-10-16 11:43:00,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:00,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:00,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:00,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:00,207 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:00,755 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 11:43:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:00,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:00,756 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:00,756 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:00,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 11:43:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:00,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:00,762 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:00,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:00,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:00,763 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:00,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:00,965 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 11:43:00,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:00,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981476271] [2020-10-16 11:43:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981476271] [2020-10-16 11:43:01,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875297034] [2020-10-16 11:43:01,124 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:01,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:01,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:01,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:01,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:01,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:01,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660141876] [2020-10-16 11:43:01,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:01,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:01,202 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:01,939 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 11:43:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:01,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:01,940 INFO L225 Difference]: With dead ends: 95 [2020-10-16 11:43:01,940 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 11:43:01,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 11:43:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 11:43:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:01,943 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:01,944 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:01,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:01,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:01,944 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:02,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:02,145 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 11:43:02,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:02,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106166801] [2020-10-16 11:43:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106166801] [2020-10-16 11:43:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755528754] [2020-10-16 11:43:02,298 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:02,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:43:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:02,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:02,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:02,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503497428] [2020-10-16 11:43:02,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:02,388 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:02,994 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 11:43:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:02,995 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:02,995 INFO L225 Difference]: With dead ends: 92 [2020-10-16 11:43:02,995 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:02,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 11:43:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:02,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 11:43:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:02,998 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:02,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:02,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:02,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:03,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:03,206 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 11:43:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476600177] [2020-10-16 11:43:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476600177] [2020-10-16 11:43:03,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714024201] [2020-10-16 11:43:03,371 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:03,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:43:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:03,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:03,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:03,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:03,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175390430] [2020-10-16 11:43:03,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:03,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:03,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:03,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:03,524 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 11:43:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:04,427 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 11:43:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:04,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:04,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:04,428 INFO L225 Difference]: With dead ends: 91 [2020-10-16 11:43:04,428 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:04,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:04,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 11:43:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:04,431 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 11:43:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:04,431 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:04,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:04,431 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:04,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:04,432 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:04,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,633 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 11:43:04,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:04,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206061955] [2020-10-16 11:43:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206061955] [2020-10-16 11:43:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132797563] [2020-10-16 11:43:04,782 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:04,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:04,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:04,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 11:43:04,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089587526] [2020-10-16 11:43:04,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:43:04,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:43:04,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:43:04,854 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 11:43:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:05,506 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:43:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:05,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 11:43:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:05,508 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:05,508 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:05,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 11:43:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:43:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 11:43:05,510 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 11:43:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:05,510 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 11:43:05,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:43:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 11:43:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:05,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:05,511 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:05,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 11:43:05,712 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:05,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 11:43:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:05,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996404033] [2020-10-16 11:43:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996404033] [2020-10-16 11:43:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075667816] [2020-10-16 11:43:05,883 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:05,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:05,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:05,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:06,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:06,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642493711] [2020-10-16 11:43:06,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:06,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:06,015 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 11:43:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:06,919 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 11:43:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:06,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:06,920 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:43:06,920 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 11:43:06,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 11:43:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 11:43:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 11:43:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 11:43:06,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 11:43:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:06,923 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 11:43:06,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 11:43:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 11:43:06,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:06,926 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:07,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 11:43:07,133 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:07,133 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 11:43:07,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:07,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513150870] [2020-10-16 11:43:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:07,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513150870] [2020-10-16 11:43:07,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806521615] [2020-10-16 11:43:07,278 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:07,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:43:07,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:43:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:07,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:07,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:07,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:43:07,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736137523] [2020-10-16 11:43:07,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:07,364 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 11:43:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:08,143 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 11:43:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:08,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 11:43:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:08,144 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:43:08,144 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:08,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 11:43:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:08,147 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 11:43:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:08,147 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:08,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:08,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:08,148 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:08,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 11:43:08,355 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:08,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 11:43:08,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:08,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996636583] [2020-10-16 11:43:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:08,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996636583] [2020-10-16 11:43:08,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364954055] [2020-10-16 11:43:08,531 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:08,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:08,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724278003] [2020-10-16 11:43:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:08,621 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 11:43:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:09,526 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 11:43:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:09,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:09,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:09,527 INFO L225 Difference]: With dead ends: 84 [2020-10-16 11:43:09,527 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 11:43:09,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 11:43:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 11:43:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 11:43:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 11:43:09,530 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 11:43:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:09,530 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 11:43:09,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 11:43:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:09,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:09,531 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:09,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 11:43:09,731 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 11:43:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664383553] [2020-10-16 11:43:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:09,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664383553] [2020-10-16 11:43:09,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409535191] [2020-10-16 11:43:09,950 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:09,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:10,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:10,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891750680] [2020-10-16 11:43:10,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:10,010 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 11:43:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:10,367 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 11:43:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:43:10,367 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:10,368 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:10,368 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 11:43:10,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 11:43:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 11:43:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 11:43:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 11:43:10,370 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 11:43:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:10,370 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 11:43:10,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 11:43:10,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:10,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:10,371 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:10,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:10,574 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 11:43:10,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:10,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279741078] [2020-10-16 11:43:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279741078] [2020-10-16 11:43:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58223809] [2020-10-16 11:43:10,794 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:10,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:10,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:10,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:10,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:10,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:10,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:10,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:10,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392350999] [2020-10-16 11:43:10,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:10,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:10,880 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 11:43:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:11,282 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 11:43:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:43:11,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:11,287 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:11,287 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:11,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:43:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 11:43:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 11:43:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 11:43:11,289 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 11:43:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:11,290 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 11:43:11,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 11:43:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:11,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:11,290 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:11,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 11:43:11,499 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 11:43:11,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:11,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124718714] [2020-10-16 11:43:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124718714] [2020-10-16 11:43:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621426372] [2020-10-16 11:43:11,709 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:11,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:11,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:11,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:11,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179257357] [2020-10-16 11:43:11,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:11,771 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 11:43:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:12,215 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 11:43:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:12,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:12,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:12,216 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:43:12,216 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:12,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 11:43:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 11:43:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 11:43:12,219 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 11:43:12,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:12,220 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 11:43:12,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 11:43:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:12,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:12,220 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:12,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 11:43:12,430 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:12,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:12,430 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 11:43:12,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:12,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381927718] [2020-10-16 11:43:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:12,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381927718] [2020-10-16 11:43:12,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918198945] [2020-10-16 11:43:12,644 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:12,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:12,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:12,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:12,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:12,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433472578] [2020-10-16 11:43:12,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:12,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:12,725 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 11:43:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:13,200 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 11:43:13,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:13,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:13,201 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:13,201 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:13,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 11:43:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:43:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 11:43:13,204 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 11:43:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:13,204 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 11:43:13,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 11:43:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:13,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:13,205 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:13,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 11:43:13,406 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 11:43:13,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:13,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65123621] [2020-10-16 11:43:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65123621] [2020-10-16 11:43:13,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651051902] [2020-10-16 11:43:13,612 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:13,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:13,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:13,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:13,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:13,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027866155] [2020-10-16 11:43:13,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:13,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:13,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:13,671 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 11:43:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:14,165 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 11:43:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:14,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:14,166 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:43:14,167 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:43:14,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:43:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 11:43:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 11:43:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 11:43:14,169 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 11:43:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:14,170 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 11:43:14,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 11:43:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:14,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:14,171 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:14,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:14,374 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 11:43:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:14,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931164773] [2020-10-16 11:43:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931164773] [2020-10-16 11:43:14,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742762183] [2020-10-16 11:43:14,582 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:14,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:14,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:14,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:14,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:14,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:14,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979803374] [2020-10-16 11:43:14,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:14,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:14,663 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 11:43:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:15,234 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 11:43:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:15,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:15,236 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:43:15,236 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:43:15,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:43:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 11:43:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:43:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 11:43:15,238 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 11:43:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:15,239 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 11:43:15,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 11:43:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:15,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:15,239 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:15,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:15,444 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 11:43:15,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:15,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160473012] [2020-10-16 11:43:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160473012] [2020-10-16 11:43:15,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610855491] [2020-10-16 11:43:15,634 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:15,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:15,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:15,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:15,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:15,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783601404] [2020-10-16 11:43:15,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:15,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:15,701 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 11:43:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:16,241 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 11:43:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:16,242 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:16,243 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:16,243 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:16,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 11:43:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 11:43:16,245 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 11:43:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:16,246 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 11:43:16,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 11:43:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:16,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:16,246 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:16,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:16,447 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 11:43:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:16,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760518443] [2020-10-16 11:43:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760518443] [2020-10-16 11:43:16,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020282743] [2020-10-16 11:43:16,634 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:16,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:16,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:16,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:16,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:16,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:16,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:16,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969004722] [2020-10-16 11:43:16,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:16,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:16,784 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 11:43:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:17,414 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 11:43:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:17,415 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:17,415 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:17,415 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:17,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 11:43:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 11:43:17,419 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 11:43:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:17,420 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 11:43:17,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 11:43:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:17,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:17,421 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 11:43:17,635 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 11:43:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:17,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571527301] [2020-10-16 11:43:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571527301] [2020-10-16 11:43:17,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936331938] [2020-10-16 11:43:17,816 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:17,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:17,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:17,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560831545] [2020-10-16 11:43:17,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:17,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:17,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:17,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:17,883 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 11:43:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:18,473 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 11:43:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:18,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:18,474 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:43:18,474 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:43:18,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:43:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 11:43:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 11:43:18,477 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 11:43:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:18,477 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 11:43:18,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 11:43:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:18,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:18,478 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:18,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:18,679 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:18,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 11:43:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:18,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532054740] [2020-10-16 11:43:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532054740] [2020-10-16 11:43:18,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375628692] [2020-10-16 11:43:18,863 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:18,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:18,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:18,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:18,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492878003] [2020-10-16 11:43:18,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:18,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:18,944 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 11:43:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:19,662 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 11:43:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:19,663 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:19,663 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:43:19,663 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:43:19,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:43:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 11:43:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:43:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 11:43:19,665 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 11:43:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:19,666 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 11:43:19,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 11:43:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:19,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:19,666 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:19,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 11:43:19,867 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 11:43:19,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:19,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042482509] [2020-10-16 11:43:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042482509] [2020-10-16 11:43:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683444359] [2020-10-16 11:43:20,042 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:20,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:20,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:20,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:20,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:20,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010977953] [2020-10-16 11:43:20,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:20,108 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 11:43:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:20,753 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 11:43:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:20,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:20,754 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:20,754 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:20,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 11:43:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 11:43:20,757 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 11:43:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:20,757 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 11:43:20,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 11:43:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:20,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:20,757 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:20,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 11:43:20,959 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 11:43:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828900858] [2020-10-16 11:43:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828900858] [2020-10-16 11:43:21,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554223442] [2020-10-16 11:43:21,137 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:21,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:21,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:21,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:21,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:21,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:21,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835441566] [2020-10-16 11:43:21,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:21,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:21,219 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 11:43:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:22,022 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 11:43:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:22,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:22,023 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:22,023 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:22,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 11:43:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 11:43:22,026 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 11:43:22,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:22,026 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 11:43:22,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 11:43:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:22,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:22,027 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:22,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 11:43:22,228 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:22,229 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 11:43:22,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:22,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743363233] [2020-10-16 11:43:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:22,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743363233] [2020-10-16 11:43:22,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042366657] [2020-10-16 11:43:22,398 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:22,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:22,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:22,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372475394] [2020-10-16 11:43:22,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:22,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:22,470 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 11:43:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:23,159 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 11:43:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:23,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:23,160 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:43:23,160 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:43:23,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:43:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 11:43:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:43:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 11:43:23,162 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 11:43:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:23,163 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 11:43:23,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 11:43:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:23,163 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:23,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:23,364 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:23,365 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 11:43:23,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:23,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089848677] [2020-10-16 11:43:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089848677] [2020-10-16 11:43:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712202973] [2020-10-16 11:43:23,536 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:23,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:23,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:23,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:23,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:23,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459124929] [2020-10-16 11:43:23,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:23,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:23,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:23,636 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 11:43:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:24,596 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 11:43:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:24,597 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:24,598 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:24,598 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:43:24,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:43:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 11:43:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:43:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 11:43:24,601 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 11:43:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:24,603 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 11:43:24,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 11:43:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:24,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:24,604 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:24,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 11:43:24,811 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:24,811 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 11:43:24,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:24,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429441904] [2020-10-16 11:43:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429441904] [2020-10-16 11:43:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125252976] [2020-10-16 11:43:24,978 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:25,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:25,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 11:43:25,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656292205] [2020-10-16 11:43:25,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:43:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:43:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:43:25,044 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 11:43:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:25,798 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 11:43:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:25,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 11:43:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:25,799 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:43:25,799 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:43:25,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:43:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 11:43:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 11:43:25,802 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 11:43:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:25,802 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 11:43:25,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:43:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 11:43:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:43:25,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:25,803 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:26,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:26,004 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:26,004 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 11:43:26,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:26,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473019593] [2020-10-16 11:43:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473019593] [2020-10-16 11:43:26,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069407904] [2020-10-16 11:43:26,172 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:26,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 11:43:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:26,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:26,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:26,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:43:26,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302879966] [2020-10-16 11:43:26,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:26,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:26,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:26,253 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 11:43:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:27,164 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 11:43:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:27,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 11:43:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:27,165 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:27,165 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:43:27,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:43:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 11:43:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:43:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 11:43:27,168 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 11:43:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:27,168 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 11:43:27,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 11:43:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:27,168 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:27,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:27,369 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 11:43:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:27,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077715221] [2020-10-16 11:43:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077715221] [2020-10-16 11:43:27,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831465809] [2020-10-16 11:43:27,605 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:27,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:27,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:27,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:27,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:27,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604971229] [2020-10-16 11:43:27,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:27,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:27,674 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 11:43:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:28,101 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 11:43:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:28,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:28,103 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:43:28,103 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:43:28,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 11:43:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:43:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 11:43:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:28,105 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:28,105 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:28,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:28,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:28,106 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:28,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:28,308 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 11:43:28,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:28,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321050621] [2020-10-16 11:43:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:28,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321050621] [2020-10-16 11:43:28,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776084818] [2020-10-16 11:43:28,563 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:28,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:28,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:28,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:28,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:28,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:28,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:28,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287800975] [2020-10-16 11:43:28,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:28,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:28,656 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:29,175 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:43:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:29,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:29,177 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:43:29,177 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:43:29,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:43:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 11:43:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:29,179 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:29,179 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:29,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:29,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:29,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:29,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:29,387 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 11:43:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:29,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063243080] [2020-10-16 11:43:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063243080] [2020-10-16 11:43:29,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536305425] [2020-10-16 11:43:29,621 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:29,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:29,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:29,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:29,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:29,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202608238] [2020-10-16 11:43:29,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:29,689 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:30,174 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:43:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:43:30,175 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:30,175 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:43:30,175 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:43:30,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 11:43:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:43:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 11:43:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:30,178 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:30,178 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:30,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:30,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:30,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:30,385 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 11:43:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:30,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066279769] [2020-10-16 11:43:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066279769] [2020-10-16 11:43:30,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972345020] [2020-10-16 11:43:30,617 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:30,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:30,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:30,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:30,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:30,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:30,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526559611] [2020-10-16 11:43:30,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:30,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:30,703 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:31,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:31,284 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 11:43:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:31,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:31,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:31,285 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:43:31,286 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:43:31,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:43:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:43:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 11:43:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:31,288 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:31,288 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:31,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:31,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:31,289 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:31,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 11:43:31,490 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 11:43:31,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:31,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806829411] [2020-10-16 11:43:31,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806829411] [2020-10-16 11:43:31,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652894388] [2020-10-16 11:43:31,713 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:31,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:31,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:31,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560001365] [2020-10-16 11:43:31,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:31,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:31,772 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:32,310 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 11:43:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:32,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:32,311 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:32,311 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:32,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 11:43:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:32,314 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:32,314 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:32,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:32,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:32,314 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:32,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 11:43:32,520 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 11:43:32,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:32,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034356736] [2020-10-16 11:43:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:32,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034356736] [2020-10-16 11:43:32,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552623674] [2020-10-16 11:43:32,740 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:32,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:32,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:32,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:32,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:32,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127849299] [2020-10-16 11:43:32,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:32,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:32,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:32,820 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:33,504 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 11:43:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:33,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:33,505 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:33,505 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:33,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:33,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 11:43:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:33,507 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:33,508 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:33,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:33,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:33,508 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:33,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 11:43:33,716 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 11:43:33,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:33,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146698575] [2020-10-16 11:43:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146698575] [2020-10-16 11:43:33,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333538590] [2020-10-16 11:43:33,929 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:33,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:34,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:34,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:34,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063604071] [2020-10-16 11:43:34,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:34,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:34,003 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:34,606 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 11:43:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:34,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:34,607 INFO L225 Difference]: With dead ends: 110 [2020-10-16 11:43:34,607 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 11:43:34,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 11:43:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 11:43:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:34,609 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:34,610 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:34,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:34,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:34,610 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:34,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 11:43:34,811 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 11:43:34,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:34,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480499430] [2020-10-16 11:43:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480499430] [2020-10-16 11:43:35,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438891296] [2020-10-16 11:43:35,028 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:35,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:35,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:35,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:35,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:35,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:35,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:35,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000325809] [2020-10-16 11:43:35,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:35,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:35,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:35,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:35,123 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:35,889 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 11:43:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:35,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:35,890 INFO L225 Difference]: With dead ends: 109 [2020-10-16 11:43:35,890 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:35,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 11:43:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:35,893 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:35,893 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:35,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:35,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:35,893 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:36,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,094 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:36,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 11:43:36,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:36,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869303979] [2020-10-16 11:43:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869303979] [2020-10-16 11:43:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113168913] [2020-10-16 11:43:36,295 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:36,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:36,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:36,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:36,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:36,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:36,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544577108] [2020-10-16 11:43:36,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:36,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:36,360 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:37,030 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 11:43:37,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:37,031 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:37,031 INFO L225 Difference]: With dead ends: 106 [2020-10-16 11:43:37,032 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 11:43:37,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 11:43:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 11:43:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:37,034 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:37,034 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:37,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:37,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:37,034 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:37,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 11:43:37,235 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 11:43:37,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:37,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988829768] [2020-10-16 11:43:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988829768] [2020-10-16 11:43:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654598267] [2020-10-16 11:43:37,441 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:37,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:37,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:37,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:37,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:37,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:37,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429227445] [2020-10-16 11:43:37,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:37,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:37,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:37,534 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:38,385 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 11:43:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:43:38,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:38,386 INFO L225 Difference]: With dead ends: 105 [2020-10-16 11:43:38,386 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 11:43:38,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:43:38,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 11:43:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 11:43:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:38,389 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:38,389 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:38,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:38,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:38,390 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:38,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:38,593 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 11:43:38,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:38,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617366008] [2020-10-16 11:43:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617366008] [2020-10-16 11:43:38,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192763652] [2020-10-16 11:43:38,800 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:38,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:38,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:38,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368490313] [2020-10-16 11:43:38,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:38,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:38,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:38,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:38,867 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:39,610 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 11:43:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:43:39,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:39,611 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:43:39,611 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:43:39,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:43:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 11:43:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:39,613 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:39,613 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:39,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:39,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:39,614 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:39,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:39,815 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 11:43:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:39,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139689744] [2020-10-16 11:43:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:40,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139689744] [2020-10-16 11:43:40,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355002341] [2020-10-16 11:43:40,015 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:40,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:40,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:40,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:40,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:40,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:40,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892159711] [2020-10-16 11:43:40,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:40,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:40,107 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:41,044 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 11:43:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:43:41,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:41,045 INFO L225 Difference]: With dead ends: 101 [2020-10-16 11:43:41,045 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:43:41,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:43:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:43:41,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 11:43:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:41,048 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:41,048 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:41,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:41,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:41,049 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:41,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 11:43:41,251 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 11:43:41,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:41,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666418875] [2020-10-16 11:43:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666418875] [2020-10-16 11:43:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989415964] [2020-10-16 11:43:41,446 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:41,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 11:43:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:41,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:41,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:41,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:41,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466430734] [2020-10-16 11:43:41,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:41,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:41,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:41,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:41,525 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:42,302 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 11:43:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:43:42,303 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:42,304 INFO L225 Difference]: With dead ends: 98 [2020-10-16 11:43:42,304 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:43:42,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:43:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:43:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 11:43:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:43:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:43:42,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 11:43:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:42,307 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:43:42,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:43:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:42,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:42,307 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:42,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:42,508 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 11:43:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:42,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412680940] [2020-10-16 11:43:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412680940] [2020-10-16 11:43:42,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120197488] [2020-10-16 11:43:42,701 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:42,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:42,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:42,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:42,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471472378] [2020-10-16 11:43:42,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:42,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:42,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:42,790 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 11:43:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:43,834 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 11:43:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:43:43,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:43,835 INFO L225 Difference]: With dead ends: 97 [2020-10-16 11:43:43,835 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:43:43,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:43:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:43:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 11:43:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:43:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:43:43,838 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 11:43:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:43,838 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:43:43,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:43:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:43,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:43,839 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:44,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 11:43:44,040 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 11:43:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:44,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456504265] [2020-10-16 11:43:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:44,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:44,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456504265] [2020-10-16 11:43:44,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385026568] [2020-10-16 11:43:44,228 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:44,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 11:43:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:44,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:44,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 11:43:44,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854913418] [2020-10-16 11:43:44,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:43:44,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:43:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:43:44,302 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 11:43:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:45,142 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 11:43:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:45,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 11:43:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:45,144 INFO L225 Difference]: With dead ends: 113 [2020-10-16 11:43:45,144 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 11:43:45,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:43:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 11:43:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 11:43:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:43:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 11:43:45,147 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 11:43:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:45,147 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 11:43:45,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:43:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 11:43:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:45,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:45,147 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:45,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 11:43:45,348 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 11:43:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:45,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296405024] [2020-10-16 11:43:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296405024] [2020-10-16 11:43:45,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578461923] [2020-10-16 11:43:45,550 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:45,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:43:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:45,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:45,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:45,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:45,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972629411] [2020-10-16 11:43:45,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:45,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:45,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:45,652 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 11:43:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:46,727 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 11:43:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:43:46,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:46,728 INFO L225 Difference]: With dead ends: 94 [2020-10-16 11:43:46,728 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 11:43:46,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:43:46,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 11:43:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 11:43:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 11:43:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 11:43:46,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 11:43:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:46,729 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 11:43:46,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 11:43:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:43:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:46,730 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:46,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 11:43:46,931 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 11:43:46,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:46,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554410568] [2020-10-16 11:43:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554410568] [2020-10-16 11:43:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879458147] [2020-10-16 11:43:47,120 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:43:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:47,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:47,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:47,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 11:43:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552577368] [2020-10-16 11:43:47,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:47,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:47,213 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 11:43:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:48,200 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:43:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:48,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 11:43:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:48,201 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:43:48,201 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 11:43:48,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:43:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 11:43:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 11:43:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:43:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:43:48,203 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 11:43:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:48,203 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:43:48,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:43:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:48,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:48,204 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:48,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 11:43:48,404 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 11:43:48,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:48,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662135694] [2020-10-16 11:43:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662135694] [2020-10-16 11:43:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425086068] [2020-10-16 11:43:48,619 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:48,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:48,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:48,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:43:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:48,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:48,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:48,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378171321] [2020-10-16 11:43:48,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:48,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:48,710 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 11:43:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:49,780 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 11:43:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:43:49,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:49,781 INFO L225 Difference]: With dead ends: 90 [2020-10-16 11:43:49,781 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 11:43:49,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:43:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 11:43:49,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 11:43:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 11:43:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 11:43:49,783 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 11:43:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:49,783 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 11:43:49,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 11:43:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:49,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:49,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:49,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:49,985 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 11:43:49,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:49,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833523110] [2020-10-16 11:43:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833523110] [2020-10-16 11:43:50,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515758848] [2020-10-16 11:43:50,260 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:43:50,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:50,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:50,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836833840] [2020-10-16 11:43:50,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:50,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:50,322 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 11:43:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:50,776 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 11:43:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:43:50,777 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:43:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:50,777 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:43:50,777 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 11:43:50,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 11:43:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 11:43:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 11:43:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 11:43:50,780 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 11:43:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:50,780 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 11:43:50,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 11:43:50,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:50,781 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:50,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:50,981 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 11:43:50,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:50,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504794717] [2020-10-16 11:43:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504794717] [2020-10-16 11:43:51,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43314536] [2020-10-16 11:43:51,280 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:51,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:51,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:51,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:51,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115858243] [2020-10-16 11:43:51,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:51,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:51,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:51,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:51,361 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 11:43:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:51,874 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 11:43:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 11:43:51,874 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:51,875 INFO L225 Difference]: With dead ends: 114 [2020-10-16 11:43:51,875 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:43:51,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 11:43:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:43:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 11:43:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 11:43:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 11:43:51,878 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 11:43:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:51,878 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 11:43:51,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 11:43:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:51,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:51,878 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:52,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:52,079 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 11:43:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:52,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597717260] [2020-10-16 11:43:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597717260] [2020-10-16 11:43:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058420574] [2020-10-16 11:43:52,361 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:52,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:43:52,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:52,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:52,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:52,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:52,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833258889] [2020-10-16 11:43:52,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:52,421 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 11:43:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:52,972 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 11:43:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:43:52,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:43:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:52,974 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:43:52,974 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:43:52,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:43:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:43:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 11:43:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 11:43:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 11:43:52,976 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 11:43:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:52,976 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 11:43:52,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 11:43:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:52,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:52,977 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:53,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:53,178 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 11:43:53,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:53,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402504054] [2020-10-16 11:43:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402504054] [2020-10-16 11:43:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302362818] [2020-10-16 11:43:53,460 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:53,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:43:53,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:53,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:53,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:53,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:53,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:53,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412569839] [2020-10-16 11:43:53,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:53,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:53,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:53,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:53,549 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 11:43:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:54,110 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 11:43:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:43:54,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:54,111 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:43:54,111 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:43:54,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:43:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:43:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 11:43:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:43:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 11:43:54,114 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 11:43:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:54,114 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 11:43:54,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 11:43:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:54,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:54,115 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:54,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:54,321 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 11:43:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:54,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991030062] [2020-10-16 11:43:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:54,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991030062] [2020-10-16 11:43:54,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85435677] [2020-10-16 11:43:54,576 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:54,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:54,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:54,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478726601] [2020-10-16 11:43:54,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:54,637 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 11:43:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:55,228 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 11:43:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:43:55,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:43:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:55,228 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:43:55,229 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:43:55,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:43:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:43:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 11:43:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 11:43:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 11:43:55,231 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 11:43:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:55,231 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 11:43:55,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 11:43:55,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:55,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:55,232 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:55,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:55,433 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 11:43:55,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:55,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228787000] [2020-10-16 11:43:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228787000] [2020-10-16 11:43:55,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129228515] [2020-10-16 11:43:55,687 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:55,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:43:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:55,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:55,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:55,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:55,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868158355] [2020-10-16 11:43:55,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:55,775 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 11:43:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:56,448 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 11:43:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:43:56,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:56,450 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:43:56,450 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:43:56,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:43:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:43:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 11:43:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:43:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 11:43:56,453 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 11:43:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:56,453 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 11:43:56,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 11:43:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:56,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:56,454 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:56,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:56,654 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:56,655 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 11:43:56,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:56,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279319631] [2020-10-16 11:43:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279319631] [2020-10-16 11:43:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281150764] [2020-10-16 11:43:56,908 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:56,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:43:56,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:56,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:56,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:56,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857297589] [2020-10-16 11:43:56,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:56,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:56,977 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 11:43:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:57,637 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 11:43:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:43:57,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:43:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:57,638 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:43:57,638 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:43:57,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:43:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:43:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 11:43:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:43:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 11:43:57,640 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 11:43:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:57,640 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 11:43:57,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:43:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 11:43:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:57,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:57,640 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:57,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 11:43:57,841 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:57,842 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 11:43:57,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:57,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286079771] [2020-10-16 11:43:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286079771] [2020-10-16 11:43:58,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346899168] [2020-10-16 11:43:58,091 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:58,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:43:58,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:58,160 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:43:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:58,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:58,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:43:58,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176246529] [2020-10-16 11:43:58,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:43:58,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:43:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:43:58,180 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 11:43:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:43:58,930 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 11:43:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:43:58,931 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:43:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:43:58,931 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:43:58,931 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:43:58,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:43:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:43:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 11:43:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:43:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 11:43:58,933 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 11:43:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:43:58,934 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 11:43:58,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:43:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 11:43:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:43:58,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:43:58,934 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:43:59,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 11:43:59,135 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:43:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:43:59,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 11:43:59,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:43:59,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089332158] [2020-10-16 11:43:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:43:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:43:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089332158] [2020-10-16 11:43:59,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843649452] [2020-10-16 11:43:59,372 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:43:59,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:43:59,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:43:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:43:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:43:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:43:59,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:43:59,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:43:59,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122101583] [2020-10-16 11:43:59,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:43:59,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:43:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:43:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:43:59,441 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 11:44:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:00,146 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 11:44:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:00,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:00,147 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:44:00,147 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 11:44:00,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 11:44:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 11:44:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:44:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 11:44:00,149 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 11:44:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:00,149 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 11:44:00,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 11:44:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:00,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:00,150 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:00,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 11:44:00,351 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 11:44:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:00,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465771375] [2020-10-16 11:44:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465771375] [2020-10-16 11:44:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913397654] [2020-10-16 11:44:00,587 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:00,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:00,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:00,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:00,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:00,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:00,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:00,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:00,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821421944] [2020-10-16 11:44:00,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:00,676 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 11:44:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:01,532 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 11:44:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:01,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:01,533 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:01,533 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:01,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 11:44:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:44:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 11:44:01,536 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 11:44:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:01,536 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 11:44:01,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 11:44:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:01,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:01,536 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:01,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 11:44:01,737 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 11:44:01,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:01,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166233764] [2020-10-16 11:44:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:01,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166233764] [2020-10-16 11:44:01,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097670752] [2020-10-16 11:44:01,966 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:02,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:02,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:02,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:02,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807647704] [2020-10-16 11:44:02,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:02,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:02,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:02,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:02,036 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 11:44:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:02,801 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 11:44:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:02,802 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:02,803 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:02,803 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:02,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 11:44:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:44:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 11:44:02,805 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 11:44:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:02,805 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 11:44:02,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 11:44:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:02,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:02,806 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:03,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:03,007 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:03,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:03,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 11:44:03,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:03,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836661129] [2020-10-16 11:44:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836661129] [2020-10-16 11:44:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206361804] [2020-10-16 11:44:03,240 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:03,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:03,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:03,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:03,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:03,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:03,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723858804] [2020-10-16 11:44:03,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:03,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:03,326 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 11:44:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:04,242 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 11:44:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:04,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:04,243 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:04,243 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:04,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 11:44:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:44:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 11:44:04,246 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 11:44:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:04,246 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 11:44:04,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 11:44:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:04,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:04,246 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:04,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:04,447 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 11:44:04,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:04,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775675218] [2020-10-16 11:44:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:04,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775675218] [2020-10-16 11:44:04,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10870948] [2020-10-16 11:44:04,667 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:04,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:04,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:04,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:04,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:04,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089927847] [2020-10-16 11:44:04,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:04,743 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 11:44:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:05,564 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 11:44:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:05,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:05,565 INFO L225 Difference]: With dead ends: 121 [2020-10-16 11:44:05,565 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 11:44:05,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 11:44:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 11:44:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:44:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 11:44:05,567 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 11:44:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:05,567 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 11:44:05,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 11:44:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:05,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:05,568 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:05,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 11:44:05,769 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 11:44:05,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:05,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118904756] [2020-10-16 11:44:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:05,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118904756] [2020-10-16 11:44:05,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644465019] [2020-10-16 11:44:05,993 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:06,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:06,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:06,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:06,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:06,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742232939] [2020-10-16 11:44:06,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:06,087 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 11:44:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:07,099 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 11:44:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:07,100 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:07,100 INFO L225 Difference]: With dead ends: 118 [2020-10-16 11:44:07,101 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 11:44:07,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 11:44:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 11:44:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:44:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 11:44:07,103 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 11:44:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:07,103 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 11:44:07,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 11:44:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:07,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:07,104 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:07,305 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 11:44:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:07,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141265766] [2020-10-16 11:44:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141265766] [2020-10-16 11:44:07,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643513357] [2020-10-16 11:44:07,524 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:07,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:07,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:07,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:07,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:07,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:07,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288035052] [2020-10-16 11:44:07,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:07,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:07,601 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 11:44:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:08,496 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 11:44:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:08,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:08,497 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:08,498 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:08,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:08,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 11:44:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:44:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 11:44:08,501 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 11:44:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:08,501 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 11:44:08,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 11:44:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:08,502 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:08,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:08,709 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:08,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 11:44:08,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:08,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919783585] [2020-10-16 11:44:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:08,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919783585] [2020-10-16 11:44:08,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318831817] [2020-10-16 11:44:08,928 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:08,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:08,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:08,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:09,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:09,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:09,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581081310] [2020-10-16 11:44:09,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:09,025 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 11:44:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:10,140 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 11:44:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:10,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:10,142 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:10,142 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:10,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 11:44:10,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:44:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 11:44:10,145 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 11:44:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:10,145 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 11:44:10,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 11:44:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:10,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:10,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:10,347 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 11:44:10,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:10,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482332547] [2020-10-16 11:44:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482332547] [2020-10-16 11:44:10,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759150563] [2020-10-16 11:44:10,560 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:10,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:10,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:10,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:10,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 11:44:10,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305943270] [2020-10-16 11:44:10,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:44:10,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:10,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:44:10,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:44:10,629 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 11:44:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:11,575 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 11:44:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:11,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 11:44:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:11,577 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:44:11,577 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:44:11,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:44:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 11:44:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 11:44:11,580 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 11:44:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:11,581 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 11:44:11,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:44:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 11:44:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:44:11,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:11,581 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:11,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:11,789 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:11,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 11:44:11,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:11,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966345689] [2020-10-16 11:44:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966345689] [2020-10-16 11:44:12,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825583934] [2020-10-16 11:44:12,004 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:12,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:44:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:12,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:12,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:12,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:44:12,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095777243] [2020-10-16 11:44:12,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:12,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:12,099 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 11:44:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:13,247 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 11:44:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:13,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 11:44:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:13,248 INFO L225 Difference]: With dead ends: 117 [2020-10-16 11:44:13,248 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:13,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 11:44:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:44:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 11:44:13,250 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 11:44:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:13,250 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 11:44:13,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 11:44:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:13,251 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:13,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:13,452 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:13,452 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 11:44:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:13,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897624492] [2020-10-16 11:44:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:13,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897624492] [2020-10-16 11:44:13,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618192864] [2020-10-16 11:44:13,766 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:13,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:13,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:13,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:13,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:13,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829973831] [2020-10-16 11:44:13,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:13,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:13,830 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 11:44:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:14,360 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 11:44:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:14,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:14,361 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:44:14,361 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:44:14,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 11:44:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:44:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 11:44:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:14,364 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:14,364 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:14,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:14,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:14,364 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:14,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 11:44:14,565 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 11:44:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:14,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038378125] [2020-10-16 11:44:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038378125] [2020-10-16 11:44:14,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472054928] [2020-10-16 11:44:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:14,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:14,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:14,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:14,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:14,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203972641] [2020-10-16 11:44:14,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:14,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:14,976 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:15,595 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 11:44:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:15,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:15,597 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:44:15,597 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:44:15,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:44:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 11:44:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:15,599 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:15,600 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:15,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:15,600 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:15,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 11:44:15,801 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 11:44:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:15,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616519507] [2020-10-16 11:44:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:16,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616519507] [2020-10-16 11:44:16,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867095412] [2020-10-16 11:44:16,100 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:16,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:16,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:16,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:16,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:16,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:16,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463954264] [2020-10-16 11:44:16,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:16,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:16,174 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:16,772 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 11:44:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 11:44:16,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:16,774 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:44:16,774 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:44:16,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 11:44:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:44:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 11:44:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:16,776 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:16,776 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:16,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:16,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:16,777 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:16,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:16,978 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 11:44:16,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:16,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516789527] [2020-10-16 11:44:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516789527] [2020-10-16 11:44:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948295684] [2020-10-16 11:44:17,273 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:17,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:17,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:17,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:17,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:17,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544222863] [2020-10-16 11:44:17,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:17,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:17,378 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:18,076 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 11:44:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:18,077 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:18,078 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:44:18,078 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:44:18,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:44:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:44:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 11:44:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:18,081 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:18,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:18,081 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:18,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:18,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:18,081 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:18,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 11:44:18,282 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 11:44:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:18,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146475464] [2020-10-16 11:44:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146475464] [2020-10-16 11:44:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765515345] [2020-10-16 11:44:18,566 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:18,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:18,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:18,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658683202] [2020-10-16 11:44:18,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:18,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:18,632 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:19,274 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 11:44:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:19,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:19,275 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:44:19,275 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:44:19,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:44:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 11:44:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:19,277 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:19,277 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:19,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:19,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:19,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:19,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:19,479 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 11:44:19,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:19,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796970431] [2020-10-16 11:44:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796970431] [2020-10-16 11:44:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956104709] [2020-10-16 11:44:19,764 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:19,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:19,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:19,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:19,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:19,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:19,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447788980] [2020-10-16 11:44:19,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:19,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:19,849 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:20,658 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 11:44:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:20,659 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:20,660 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:20,660 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:20,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 11:44:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:20,663 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:20,663 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:20,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:20,663 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:20,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:20,663 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:20,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:20,864 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 11:44:20,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:20,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737555532] [2020-10-16 11:44:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:21,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737555532] [2020-10-16 11:44:21,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687074635] [2020-10-16 11:44:21,132 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:21,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:21,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:21,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:21,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:21,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:21,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64416929] [2020-10-16 11:44:21,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:21,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:21,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:21,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:21,200 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:21,918 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 11:44:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:21,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:21,920 INFO L225 Difference]: With dead ends: 120 [2020-10-16 11:44:21,920 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 11:44:21,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 11:44:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 11:44:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:21,922 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:21,922 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:21,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:21,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:21,923 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:22,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:22,124 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 11:44:22,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:22,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202422628] [2020-10-16 11:44:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:22,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202422628] [2020-10-16 11:44:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465780803] [2020-10-16 11:44:22,395 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:22,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:22,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:22,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:22,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:22,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:22,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:22,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944977765] [2020-10-16 11:44:22,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:22,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:22,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:22,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:22,490 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:23,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:23,387 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 11:44:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:23,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:23,388 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:23,388 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:23,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 11:44:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:23,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:23,391 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:23,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:23,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:23,392 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:23,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:23,595 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 11:44:23,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:23,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250768421] [2020-10-16 11:44:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:23,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250768421] [2020-10-16 11:44:23,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223115718] [2020-10-16 11:44:23,858 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:23,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:23,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:23,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:23,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287739893] [2020-10-16 11:44:23,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:23,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:23,930 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:24,762 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 11:44:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:24,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:24,764 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:24,764 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 11:44:24,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 11:44:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 11:44:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:24,766 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:24,767 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:24,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:24,768 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:24,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 11:44:24,968 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 11:44:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:24,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793419848] [2020-10-16 11:44:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793419848] [2020-10-16 11:44:25,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300187560] [2020-10-16 11:44:25,242 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:25,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:25,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:25,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:25,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:25,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:25,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312062737] [2020-10-16 11:44:25,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:25,334 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:26,345 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 11:44:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:26,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:26,347 INFO L225 Difference]: With dead ends: 115 [2020-10-16 11:44:26,347 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 11:44:26,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 11:44:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 11:44:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:26,350 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:26,350 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:26,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:26,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:26,351 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:26,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:26,560 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:26,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 11:44:26,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:26,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255532348] [2020-10-16 11:44:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255532348] [2020-10-16 11:44:26,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021257090] [2020-10-16 11:44:26,811 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:26,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:26,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451408053] [2020-10-16 11:44:26,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:26,877 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:27,738 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 11:44:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:27,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:27,739 INFO L225 Difference]: With dead ends: 112 [2020-10-16 11:44:27,739 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 11:44:27,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 11:44:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 11:44:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:27,742 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:27,742 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:27,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:27,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:27,743 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:27,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 11:44:27,944 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:27,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 11:44:27,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:27,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250288295] [2020-10-16 11:44:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:28,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250288295] [2020-10-16 11:44:28,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376714586] [2020-10-16 11:44:28,209 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:28,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:28,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:28,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:28,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:28,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470392439] [2020-10-16 11:44:28,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:28,298 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:29,427 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 11:44:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:44:29,427 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:29,428 INFO L225 Difference]: With dead ends: 111 [2020-10-16 11:44:29,428 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 11:44:29,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 11:44:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 11:44:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:29,430 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:29,430 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:29,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:29,431 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:29,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 11:44:29,632 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 11:44:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:29,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031630039] [2020-10-16 11:44:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031630039] [2020-10-16 11:44:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049551861] [2020-10-16 11:44:29,881 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:29,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:29,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:29,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:29,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591198594] [2020-10-16 11:44:29,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:29,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:29,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:29,958 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:30,920 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 11:44:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:30,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:30,921 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:44:30,921 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 11:44:30,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 11:44:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 11:44:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:30,924 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:30,924 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:30,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:30,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:30,924 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:31,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:31,128 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 11:44:31,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:31,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133778101] [2020-10-16 11:44:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133778101] [2020-10-16 11:44:31,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890010326] [2020-10-16 11:44:31,387 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:31,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:31,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:31,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:31,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:31,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:31,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:31,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660054331] [2020-10-16 11:44:31,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:31,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:31,474 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:32,674 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 11:44:32,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:44:32,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:32,676 INFO L225 Difference]: With dead ends: 107 [2020-10-16 11:44:32,676 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 11:44:32,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:44:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 11:44:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 11:44:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:32,679 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:32,679 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:32,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:32,680 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:32,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:32,884 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:32,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 11:44:32,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:32,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868032647] [2020-10-16 11:44:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:33,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868032647] [2020-10-16 11:44:33,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197758747] [2020-10-16 11:44:33,136 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:33,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 11:44:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:33,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:33,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:33,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:33,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972345025] [2020-10-16 11:44:33,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:33,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:33,209 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:34,219 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 11:44:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:44:34,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:34,220 INFO L225 Difference]: With dead ends: 104 [2020-10-16 11:44:34,220 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 11:44:34,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:44:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 11:44:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 11:44:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:44:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:44:34,224 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 11:44:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:34,224 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:44:34,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:44:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:34,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:34,224 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:34,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:34,428 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:34,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 11:44:34,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:34,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940470903] [2020-10-16 11:44:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:34,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940470903] [2020-10-16 11:44:34,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803647251] [2020-10-16 11:44:34,675 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:34,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:44:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:34,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:34,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:34,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325336012] [2020-10-16 11:44:34,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:34,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:34,784 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 11:44:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:36,074 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 11:44:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:44:36,074 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:36,075 INFO L225 Difference]: With dead ends: 103 [2020-10-16 11:44:36,075 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 11:44:36,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:44:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 11:44:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 11:44:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:44:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:44:36,078 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 11:44:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:36,078 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:44:36,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:44:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:36,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:36,079 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:36,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 11:44:36,286 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 11:44:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:36,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870213810] [2020-10-16 11:44:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870213810] [2020-10-16 11:44:36,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549404007] [2020-10-16 11:44:36,537 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:36,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:36,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 11:44:36,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776259568] [2020-10-16 11:44:36,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 11:44:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 11:44:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 11:44:36,612 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 11:44:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:37,672 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 11:44:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:37,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 11:44:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:37,673 INFO L225 Difference]: With dead ends: 119 [2020-10-16 11:44:37,674 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 11:44:37,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:44:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 11:44:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 11:44:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 11:44:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 11:44:37,676 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 11:44:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:37,676 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 11:44:37,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 11:44:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 11:44:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:37,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:37,677 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:37,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:37,877 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 11:44:37,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:37,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329642342] [2020-10-16 11:44:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329642342] [2020-10-16 11:44:38,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915440566] [2020-10-16 11:44:38,126 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:38,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:38,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:38,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:38,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092415323] [2020-10-16 11:44:38,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:38,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:38,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:38,222 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 11:44:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:39,575 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 11:44:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:44:39,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:39,576 INFO L225 Difference]: With dead ends: 100 [2020-10-16 11:44:39,576 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 11:44:39,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 11:44:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 11:44:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 11:44:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 11:44:39,579 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 11:44:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:39,579 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 11:44:39,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 11:44:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 11:44:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:39,580 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:39,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:39,781 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:39,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 11:44:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288741094] [2020-10-16 11:44:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288741094] [2020-10-16 11:44:40,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108993156] [2020-10-16 11:44:40,029 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:40,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 11:44:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:40,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:44:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:40,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:40,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:40,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 11:44:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963365845] [2020-10-16 11:44:40,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:40,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:40,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:40,143 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 11:44:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:41,446 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 11:44:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:41,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 11:44:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:41,447 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:44:41,447 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 11:44:41,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:44:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 11:44:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 11:44:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:44:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:44:41,450 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 11:44:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:41,450 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:44:41,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:44:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:41,450 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:41,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:41,651 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 11:44:41,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:41,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128759792] [2020-10-16 11:44:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128759792] [2020-10-16 11:44:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245768149] [2020-10-16 11:44:41,925 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:41,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:41,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:41,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:42,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 11:44:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:42,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:42,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028732343] [2020-10-16 11:44:42,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:42,033 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 11:44:43,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:43,387 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 11:44:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:44:43,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:43,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:43,388 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:44:43,388 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 11:44:43,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:44:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 11:44:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 11:44:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 11:44:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 11:44:43,390 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 11:44:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:43,390 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 11:44:43,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 11:44:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:43,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:43,391 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:43,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:43,592 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 11:44:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:43,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177807559] [2020-10-16 11:44:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177807559] [2020-10-16 11:44:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078375247] [2020-10-16 11:44:43,947 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:43,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:44:43,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:44,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:44,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:44,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492671911] [2020-10-16 11:44:44,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:44,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:44,007 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 11:44:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:44,534 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 11:44:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 11:44:44,535 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:44,536 INFO L225 Difference]: With dead ends: 102 [2020-10-16 11:44:44,536 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 11:44:44,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 11:44:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 11:44:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 11:44:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 11:44:44,538 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 11:44:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:44,538 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 11:44:44,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 11:44:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:44,539 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:44,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 11:44:44,740 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 11:44:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:44,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991741975] [2020-10-16 11:44:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991741975] [2020-10-16 11:44:45,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69853822] [2020-10-16 11:44:45,098 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:45,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:44:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:45,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:45,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:45,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:45,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796976325] [2020-10-16 11:44:45,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:45,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:45,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:45,190 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 11:44:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:45,794 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 11:44:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:44:45,795 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:45,796 INFO L225 Difference]: With dead ends: 122 [2020-10-16 11:44:45,796 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:44:45,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:44:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:44:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 11:44:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 11:44:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 11:44:45,798 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 11:44:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:45,798 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 11:44:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 11:44:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:45,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:45,799 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:45,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 11:44:46,002 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 11:44:46,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:46,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027902445] [2020-10-16 11:44:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:46,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027902445] [2020-10-16 11:44:46,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680770919] [2020-10-16 11:44:46,351 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:46,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:46,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:46,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357870686] [2020-10-16 11:44:46,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:46,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:46,411 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 11:44:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:47,072 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 11:44:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:44:47,073 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:47,073 INFO L225 Difference]: With dead ends: 123 [2020-10-16 11:44:47,074 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:44:47,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:44:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:44:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 11:44:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 11:44:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 11:44:47,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 11:44:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:47,077 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 11:44:47,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:47,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 11:44:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:47,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:47,077 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:47,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 11:44:47,278 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:47,279 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 11:44:47,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:47,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220627601] [2020-10-16 11:44:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220627601] [2020-10-16 11:44:47,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813971841] [2020-10-16 11:44:47,633 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:47,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:47,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:47,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:47,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:47,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:47,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:47,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450942107] [2020-10-16 11:44:47,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:47,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:47,720 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 11:44:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:48,394 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 11:44:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:44:48,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:48,395 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:44:48,395 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:44:48,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 11:44:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:44:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 11:44:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 11:44:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 11:44:48,398 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 11:44:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:48,398 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 11:44:48,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 11:44:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:48,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:48,398 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:48,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 11:44:48,606 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 11:44:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:48,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424348852] [2020-10-16 11:44:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:48,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424348852] [2020-10-16 11:44:48,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144535022] [2020-10-16 11:44:48,935 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:48,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:44:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:49,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:49,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:49,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735139618] [2020-10-16 11:44:49,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:49,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:49,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:49,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:49,003 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 11:44:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:49,733 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 11:44:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:44:49,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:49,734 INFO L225 Difference]: With dead ends: 139 [2020-10-16 11:44:49,734 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 11:44:49,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 11:44:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 11:44:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 11:44:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 11:44:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 11:44:49,736 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 11:44:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:49,736 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 11:44:49,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 11:44:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:49,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:49,736 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:49,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:49,937 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:49,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:49,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 11:44:49,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:49,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336408854] [2020-10-16 11:44:49,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336408854] [2020-10-16 11:44:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347259705] [2020-10-16 11:44:50,270 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:50,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:50,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:50,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:50,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:50,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:50,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521786143] [2020-10-16 11:44:50,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:50,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:50,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:50,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:50,361 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 11:44:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:51,188 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 11:44:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:44:51,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:51,189 INFO L225 Difference]: With dead ends: 136 [2020-10-16 11:44:51,189 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 11:44:51,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:44:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 11:44:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 11:44:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 11:44:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 11:44:51,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 11:44:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 11:44:51,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 11:44:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:51,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:51,192 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:51,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 11:44:51,393 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 11:44:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:51,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865862850] [2020-10-16 11:44:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865862850] [2020-10-16 11:44:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276904066] [2020-10-16 11:44:51,725 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:51,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:44:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:51,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:51,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541827852] [2020-10-16 11:44:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:51,792 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 11:44:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:52,578 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 11:44:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:44:52,579 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:52,580 INFO L225 Difference]: With dead ends: 137 [2020-10-16 11:44:52,580 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 11:44:52,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 11:44:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 11:44:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 11:44:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 11:44:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 11:44:52,583 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 11:44:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:52,583 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 11:44:52,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 11:44:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:52,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:52,583 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:52,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:52,784 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 11:44:52,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:52,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062760843] [2020-10-16 11:44:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:53,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062760843] [2020-10-16 11:44:53,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025585236] [2020-10-16 11:44:53,101 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:53,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:44:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:53,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:53,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:53,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788744521] [2020-10-16 11:44:53,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:53,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:53,219 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 11:44:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:54,135 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 11:44:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 11:44:54,135 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:54,136 INFO L225 Difference]: With dead ends: 134 [2020-10-16 11:44:54,136 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 11:44:54,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 11:44:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 11:44:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 11:44:54,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 11:44:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 11:44:54,138 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 11:44:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:54,138 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 11:44:54,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 11:44:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:54,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:54,139 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:54,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 11:44:54,343 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 11:44:54,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:54,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755968081] [2020-10-16 11:44:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755968081] [2020-10-16 11:44:54,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371495815] [2020-10-16 11:44:54,647 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:54,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:54,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:54,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:54,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:54,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134094931] [2020-10-16 11:44:54,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:54,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:54,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:54,714 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 11:44:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:55,582 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 11:44:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 11:44:55,583 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:55,583 INFO L225 Difference]: With dead ends: 135 [2020-10-16 11:44:55,583 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 11:44:55,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 11:44:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 11:44:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 11:44:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 11:44:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 11:44:55,586 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 11:44:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:55,586 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 11:44:55,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 11:44:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:55,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:55,587 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:55,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:55,788 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 11:44:55,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:55,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730335007] [2020-10-16 11:44:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730335007] [2020-10-16 11:44:56,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478267274] [2020-10-16 11:44:56,102 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:56,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:44:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:56,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:56,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:56,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829333562] [2020-10-16 11:44:56,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:56,191 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 11:44:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:57,212 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 11:44:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 11:44:57,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:44:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:57,213 INFO L225 Difference]: With dead ends: 132 [2020-10-16 11:44:57,213 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 11:44:57,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 11:44:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 11:44:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 11:44:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 11:44:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 11:44:57,215 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 11:44:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:57,215 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 11:44:57,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:44:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 11:44:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:57,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:57,216 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:57,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:57,417 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 11:44:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:57,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799936598] [2020-10-16 11:44:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:57,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799936598] [2020-10-16 11:44:57,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542640323] [2020-10-16 11:44:57,711 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:57,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:44:57,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:57,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:57,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:44:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162219166] [2020-10-16 11:44:57,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:44:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:44:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:44:57,787 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 11:44:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:44:58,715 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 11:44:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:44:58,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:44:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:44:58,716 INFO L225 Difference]: With dead ends: 133 [2020-10-16 11:44:58,716 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 11:44:58,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 11:44:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 11:44:58,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 11:44:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 11:44:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 11:44:58,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 11:44:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:44:58,718 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 11:44:58,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:44:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 11:44:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:44:58,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:44:58,718 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:44:58,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:58,919 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:44:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:44:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 11:44:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:44:58,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037187468] [2020-10-16 11:44:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:44:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:44:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037187468] [2020-10-16 11:44:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792062462] [2020-10-16 11:44:59,225 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:44:59,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:44:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:44:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:44:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:44:59,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:44:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:44:59,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:44:59,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:44:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61491393] [2020-10-16 11:44:59,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:44:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:44:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:44:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:44:59,321 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 11:45:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:00,421 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 11:45:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:45:00,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:00,422 INFO L225 Difference]: With dead ends: 130 [2020-10-16 11:45:00,422 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 11:45:00,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 11:45:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 11:45:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 11:45:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:45:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 11:45:00,425 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 11:45:00,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:00,425 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 11:45:00,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:00,425 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 11:45:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:00,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:00,425 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:00,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:00,626 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 11:45:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:00,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879768630] [2020-10-16 11:45:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879768630] [2020-10-16 11:45:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595177276] [2020-10-16 11:45:00,909 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:00,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:00,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:00,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:00,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:00,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:00,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571483116] [2020-10-16 11:45:00,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:00,980 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 11:45:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:01,969 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 11:45:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 11:45:01,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:01,970 INFO L225 Difference]: With dead ends: 131 [2020-10-16 11:45:01,970 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 11:45:01,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 11:45:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 11:45:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 11:45:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 11:45:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 11:45:01,972 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 11:45:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:01,972 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 11:45:01,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 11:45:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:01,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:01,973 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:02,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 11:45:02,174 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 11:45:02,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:02,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162454301] [2020-10-16 11:45:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162454301] [2020-10-16 11:45:02,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044374728] [2020-10-16 11:45:02,460 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:02,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:02,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:02,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:02,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:02,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825008480] [2020-10-16 11:45:02,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:02,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:02,556 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 11:45:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:03,762 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 11:45:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:45:03,763 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:03,764 INFO L225 Difference]: With dead ends: 128 [2020-10-16 11:45:03,764 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 11:45:03,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 11:45:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 11:45:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 11:45:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 11:45:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 11:45:03,766 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 11:45:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:03,767 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 11:45:03,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 11:45:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:03,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:03,767 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:03,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 11:45:03,968 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 11:45:03,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:03,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515077298] [2020-10-16 11:45:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:04,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515077298] [2020-10-16 11:45:04,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284790686] [2020-10-16 11:45:04,244 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:04,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:04,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653126074] [2020-10-16 11:45:04,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:04,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:04,311 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 11:45:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:05,362 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 11:45:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:45:05,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:05,363 INFO L225 Difference]: With dead ends: 129 [2020-10-16 11:45:05,363 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 11:45:05,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:45:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 11:45:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 11:45:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 11:45:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 11:45:05,365 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 11:45:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:05,366 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 11:45:05,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 11:45:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:05,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:05,366 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:05,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 11:45:05,567 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 11:45:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:05,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761898962] [2020-10-16 11:45:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761898962] [2020-10-16 11:45:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125769750] [2020-10-16 11:45:05,852 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:05,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:45:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:05,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:05,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:05,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:05,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474219605] [2020-10-16 11:45:05,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:05,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:05,944 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 11:45:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:07,251 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 11:45:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 11:45:07,252 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:07,253 INFO L225 Difference]: With dead ends: 126 [2020-10-16 11:45:07,253 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 11:45:07,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 11:45:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 11:45:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 11:45:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 11:45:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 11:45:07,256 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 11:45:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:07,256 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 11:45:07,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 11:45:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:07,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:07,257 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:07,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 11:45:07,457 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:07,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 11:45:07,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:07,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876666828] [2020-10-16 11:45:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:07,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876666828] [2020-10-16 11:45:07,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595712390] [2020-10-16 11:45:07,735 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:07,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 11:45:07,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:07,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:07,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:07,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:07,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793100879] [2020-10-16 11:45:07,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:07,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:07,817 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 11:45:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:08,973 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 11:45:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 11:45:08,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:08,974 INFO L225 Difference]: With dead ends: 127 [2020-10-16 11:45:08,975 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 11:45:08,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 11:45:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 11:45:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 11:45:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 11:45:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 11:45:08,977 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 11:45:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:08,977 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 11:45:08,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 11:45:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:08,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:08,978 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:09,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,178 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:09,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 11:45:09,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:09,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534695570] [2020-10-16 11:45:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534695570] [2020-10-16 11:45:09,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863331461] [2020-10-16 11:45:09,466 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:09,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:45:09,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:09,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:09,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:09,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:09,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:09,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765390830] [2020-10-16 11:45:09,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:09,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:09,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:09,568 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 11:45:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:10,969 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 11:45:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 11:45:10,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:10,970 INFO L225 Difference]: With dead ends: 124 [2020-10-16 11:45:10,970 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 11:45:10,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 11:45:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 11:45:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 11:45:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 11:45:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 11:45:10,973 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 11:45:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:10,974 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 11:45:10,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 11:45:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:10,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:10,974 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:11,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 11:45:11,181 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 11:45:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823693803] [2020-10-16 11:45:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:11,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823693803] [2020-10-16 11:45:11,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298372790] [2020-10-16 11:45:11,461 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:11,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 11:45:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:11,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:11,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 11:45:11,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495530658] [2020-10-16 11:45:11,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:45:11,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:45:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:45:11,539 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 11:45:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:12,741 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 11:45:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 11:45:12,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 11:45:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:12,742 INFO L225 Difference]: With dead ends: 144 [2020-10-16 11:45:12,742 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 11:45:12,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 11:45:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 11:45:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 11:45:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 11:45:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 11:45:12,746 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 11:45:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:12,746 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 11:45:12,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:45:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 11:45:12,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:45:12,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:12,747 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:12,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:12,954 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 11:45:12,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:12,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582146583] [2020-10-16 11:45:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:45:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582146583] [2020-10-16 11:45:13,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808283191] [2020-10-16 11:45:13,242 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:45:13,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 11:45:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:45:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 11:45:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:45:13,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 11:45:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:45:13,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:45:13,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 11:45:13,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718988724] [2020-10-16 11:45:13,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 11:45:13,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:45:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 11:45:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 11:45:13,343 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 11:45:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:45:14,776 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 11:45:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 11:45:14,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 11:45:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:45:14,777 INFO L225 Difference]: With dead ends: 125 [2020-10-16 11:45:14,777 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 11:45:14,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 11:45:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 11:45:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 11:45:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 11:45:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 11:45:14,779 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 11:45:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:45:14,779 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 11:45:14,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 11:45:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 11:45:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 11:45:14,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:45:14,780 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:45:14,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 11:45:14,981 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:45:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:45:14,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 11:45:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:45:14,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177904927] [2020-10-16 11:45:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:45:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:45:14,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:45:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 11:45:14,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 11:45:15,026 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 11:45:15,026 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 11:45:15,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-16 11:45:15,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:45:15 BasicIcfg [2020-10-16 11:45:15,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:45:15,106 INFO L168 Benchmark]: Toolchain (without parser) took 222785.81 ms. Allocated memory was 147.8 MB in the beginning and 315.6 MB in the end (delta: 167.8 MB). Free memory was 102.8 MB in the beginning and 223.2 MB in the end (delta: -120.5 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,107 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 11:45:15,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 163.4 MB in the end (delta: -60.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,108 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.73 ms. Allocated memory is still 204.5 MB. Free memory was 163.4 MB in the beginning and 161.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,108 INFO L168 Benchmark]: Boogie Preprocessor took 27.38 ms. Allocated memory is still 204.5 MB. Free memory was 161.5 MB in the beginning and 160.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,109 INFO L168 Benchmark]: RCFGBuilder took 364.63 ms. Allocated memory is still 204.5 MB. Free memory was 160.2 MB in the beginning and 139.6 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,109 INFO L168 Benchmark]: TraceAbstraction took 221677.71 ms. Allocated memory was 204.5 MB in the beginning and 315.6 MB in the end (delta: 111.1 MB). Free memory was 138.9 MB in the beginning and 223.2 MB in the end (delta: -84.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-10-16 11:45:15,111 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 663.21 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 163.4 MB in the end (delta: -60.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.73 ms. Allocated memory is still 204.5 MB. Free memory was 163.4 MB in the beginning and 161.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.38 ms. Allocated memory is still 204.5 MB. Free memory was 161.5 MB in the beginning and 160.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.63 ms. Allocated memory is still 204.5 MB. Free memory was 160.2 MB in the beginning and 139.6 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221677.71 ms. Allocated memory was 204.5 MB in the beginning and 315.6 MB in the end (delta: 111.1 MB). Free memory was 138.9 MB in the beginning and 223.2 MB in the end (delta: -84.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 488 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 221.4s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 121.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12096 SDslu, 22388 SDs, 0 SdLazy, 24086 SolverSat, 13803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11876 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75944 ImplicationChecksByTransitivity, 125.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 218 MinimizatonAttempts, 5505 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 41.2s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...