/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:28:45,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:28:45,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:28:45,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:28:45,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:28:45,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:28:45,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:28:45,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:28:45,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:28:45,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:28:45,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:28:45,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:28:45,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:28:45,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:28:45,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:28:45,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:28:45,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:28:45,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:28:45,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:28:45,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:28:45,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:28:45,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:28:45,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:28:45,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:28:45,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 02:28:45,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:28:45,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:28:45,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:28:45,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 02:28:46,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:28:46,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:28:46,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:28:46,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:28:46,041 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:28:46,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:28:46,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:28:46,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:28:46,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:28:46,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:28:46,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:28:46,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:28:46,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:28:46,045 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:28:46,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:28:46,045 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:28:46,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:28:46,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:28:46,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:28:46,046 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:28:46,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:28:46,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:28:46,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:28:46,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:28:46,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:28:46,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:28:46,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:28:46,049 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:28:46,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:28:46,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:28:46,585 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:28:46,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:28:46,592 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:28:46,593 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:28:46,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-17 02:28:46,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca709deec/dd1ad395d6a24b8990f8476b619ae7ca/FLAG7bc0b1bf3 [2020-09-17 02:28:47,392 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:28:47,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-17 02:28:47,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca709deec/dd1ad395d6a24b8990f8476b619ae7ca/FLAG7bc0b1bf3 [2020-09-17 02:28:47,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca709deec/dd1ad395d6a24b8990f8476b619ae7ca [2020-09-17 02:28:47,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:28:47,635 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:28:47,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:28:47,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:28:47,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:28:47,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:28:47" (1/1) ... [2020-09-17 02:28:47,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5326f5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:47, skipping insertion in model container [2020-09-17 02:28:47,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:28:47" (1/1) ... [2020-09-17 02:28:47,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:28:47,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:28:48,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:28:48,332 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:28:48,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:28:48,485 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:28:48,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48 WrapperNode [2020-09-17 02:28:48,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:28:48,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:28:48,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:28:48,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:28:48,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:28:48,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:28:48,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:28:48,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:28:48,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... [2020-09-17 02:28:48,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:28:48,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:28:48,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:28:48,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:28:48,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:28:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:28:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:28:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:28:48,685 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:28:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:28:48,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:28:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:28:48,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:28:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:28:48,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:28:48,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:28:48,690 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:28:49,130 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:28:49,130 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:28:49,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:28:49 BoogieIcfgContainer [2020-09-17 02:28:49,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:28:49,138 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:28:49,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:28:49,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:28:49,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:28:47" (1/3) ... [2020-09-17 02:28:49,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32af1da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:28:49, skipping insertion in model container [2020-09-17 02:28:49,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:28:48" (2/3) ... [2020-09-17 02:28:49,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32af1da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:28:49, skipping insertion in model container [2020-09-17 02:28:49,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:28:49" (3/3) ... [2020-09-17 02:28:49,149 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-17 02:28:49,164 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:28:49,164 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:28:49,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:28:49,177 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:28:49,208 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,208 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,209 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,209 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,209 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,210 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,210 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,210 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,211 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,211 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,211 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,212 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,212 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,213 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,213 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,213 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,214 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,214 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,214 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,215 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,215 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,215 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,216 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,216 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,217 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,222 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,222 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,223 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,224 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,241 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,241 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,242 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,242 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,243 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:28:49,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:28:49,298 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:28:49,298 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:28:49,298 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:28:49,299 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:28:49,299 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:28:49,299 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:28:49,299 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:28:49,299 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:28:49,319 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 02:28:49,321 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:28:49,367 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:28:49,367 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:28:49,375 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:28:49,378 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:28:49,397 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:28:49,397 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:28:49,398 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:28:49,401 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 02:28:49,402 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:28:50,693 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 02:28:50,961 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 02:28:50,961 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 02:28:50,967 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:28:50,981 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:28:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:28:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:28:50,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:50,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:28:50,994 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 02:28:51,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:51,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528437513] [2020-09-17 02:28:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:51,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528437513] [2020-09-17 02:28:51,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:28:51,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:28:51,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384174628] [2020-09-17 02:28:51,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:28:51,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:28:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:28:51,379 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:28:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:51,483 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 02:28:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:28:51,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:28:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:51,506 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:28:51,506 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 02:28:51,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:28:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 02:28:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 02:28:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:28:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 02:28:51,568 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 02:28:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:51,569 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 02:28:51,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:28:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 02:28:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:28:51,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:51,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:51,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:28:51,571 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 02:28:51,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:51,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631786863] [2020-09-17 02:28:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:51,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631786863] [2020-09-17 02:28:51,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:28:51,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:28:51,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223530252] [2020-09-17 02:28:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:28:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:28:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:28:51,725 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 02:28:51,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:51,768 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 02:28:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 02:28:51,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:28:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:51,770 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:28:51,770 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 02:28:51,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:28:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 02:28:51,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 02:28:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:28:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 02:28:51,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 02:28:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:51,782 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 02:28:51,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:28:51,783 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 02:28:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:28:51,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:51,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:51,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:28:51,785 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 02:28:51,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:51,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105467927] [2020-09-17 02:28:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:51,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105467927] [2020-09-17 02:28:51,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:28:51,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:28:51,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175102818] [2020-09-17 02:28:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:28:51,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:28:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:28:51,929 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-17 02:28:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:52,028 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 02:28:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:28:52,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:28:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:52,030 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:28:52,031 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:28:52,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:28:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-17 02:28:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:28:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:28:52,041 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-17 02:28:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:52,042 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:28:52,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:28:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:28:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:28:52,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:52,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:52,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:28:52,044 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-17 02:28:52,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:52,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316287011] [2020-09-17 02:28:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:52,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316287011] [2020-09-17 02:28:52,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:28:52,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:28:52,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184013649] [2020-09-17 02:28:52,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:28:52,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:52,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:28:52,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:28:52,134 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-17 02:28:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:52,216 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:28:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:28:52,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:28:52,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:52,218 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:28:52,218 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:28:52,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:28:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:28:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:28:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-17 02:28:52,226 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-17 02:28:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:52,226 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-17 02:28:52,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:28:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-17 02:28:52,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:28:52,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:52,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:52,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:28:52,228 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:52,228 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-17 02:28:52,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:52,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162144481] [2020-09-17 02:28:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:52,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162144481] [2020-09-17 02:28:52,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:28:52,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:28:52,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002829544] [2020-09-17 02:28:52,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:28:52,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:28:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:28:52,313 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-17 02:28:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:52,420 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-17 02:28:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:28:52,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:28:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:52,422 INFO L225 Difference]: With dead ends: 57 [2020-09-17 02:28:52,422 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 02:28:52,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 02:28:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-17 02:28:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:28:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:28:52,437 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-17 02:28:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:52,438 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:28:52,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:28:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:28:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:28:52,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:52,439 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:52,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-17 02:28:52,440 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-17 02:28:52,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:52,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523867833] [2020-09-17 02:28:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:52,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523867833] [2020-09-17 02:28:52,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387266497] [2020-09-17 02:28:52,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:52,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:52,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:52,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:28:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:52,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:52,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:52,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:28:52,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169713344] [2020-09-17 02:28:52,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:28:52,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:28:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:28:52,708 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-17 02:28:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:52,845 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-17 02:28:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:28:52,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:28:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:52,846 INFO L225 Difference]: With dead ends: 48 [2020-09-17 02:28:52,846 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:28:52,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:28:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:28:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:28:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:28:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 02:28:52,868 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-17 02:28:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:52,868 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 02:28:52,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:28:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 02:28:52,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:28:52,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:52,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 02:28:53,084 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-17 02:28:53,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:53,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506602868] [2020-09-17 02:28:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506602868] [2020-09-17 02:28:53,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325654177] [2020-09-17 02:28:53,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:53,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:28:53,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:53,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:28:53,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393127525] [2020-09-17 02:28:53,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:28:53,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:28:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:28:53,288 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-17 02:28:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:53,384 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:28:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:28:53,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:28:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:53,388 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:28:53,388 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:28:53,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:28:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:28:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-17 02:28:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:28:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 02:28:53,403 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-17 02:28:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:53,403 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 02:28:53,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:28:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 02:28:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:28:53,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:53,406 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:53,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:53,607 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-17 02:28:53,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:53,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119019714] [2020-09-17 02:28:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119019714] [2020-09-17 02:28:53,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695797965] [2020-09-17 02:28:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:53,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:28:53,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:28:53,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:53,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:53,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:53,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:28:53,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093351568] [2020-09-17 02:28:53,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:28:53,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:28:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:28:53,846 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-17 02:28:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:54,010 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-17 02:28:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:28:54,011 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:28:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:54,012 INFO L225 Difference]: With dead ends: 58 [2020-09-17 02:28:54,012 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 02:28:54,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:28:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 02:28:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 02:28:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:28:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:28:54,031 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-17 02:28:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:54,032 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:28:54,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:28:54,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:28:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:28:54,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:54,036 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:54,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:54,252 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:54,253 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-17 02:28:54,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:54,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622714869] [2020-09-17 02:28:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:54,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622714869] [2020-09-17 02:28:54,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429473755] [2020-09-17 02:28:54,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:28:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:54,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:54,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:28:54,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862689255] [2020-09-17 02:28:54,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:28:54,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:54,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:28:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:28:54,469 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-17 02:28:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:54,632 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:28:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:28:54,633 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:28:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:54,634 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:28:54,634 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:28:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:28:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:28:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-17 02:28:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:28:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-17 02:28:54,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-17 02:28:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:54,642 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-17 02:28:54,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:28:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-17 02:28:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:28:54,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:54,643 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:54,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:54,860 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-17 02:28:54,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:54,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945406017] [2020-09-17 02:28:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:54,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945406017] [2020-09-17 02:28:54,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105299628] [2020-09-17 02:28:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:55,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:28:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:55,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:55,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:28:55,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434325469] [2020-09-17 02:28:55,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:28:55,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:28:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:28:55,058 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-17 02:28:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:55,265 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-17 02:28:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:28:55,266 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:28:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:55,267 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:28:55,267 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:28:55,268 INFO L675 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 [2020-09-17 02:28:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:28:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-17 02:28:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-17 02:28:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-17 02:28:55,284 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-17 02:28:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:55,284 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-17 02:28:55,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:28:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-17 02:28:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:28:55,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:55,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:55,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 02:28:55,489 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-17 02:28:55,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:55,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900276063] [2020-09-17 02:28:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900276063] [2020-09-17 02:28:55,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606348181] [2020-09-17 02:28:55,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:55,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:28:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:28:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:55,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:55,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:28:55,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738758208] [2020-09-17 02:28:55,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:28:55,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:28:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:28:55,775 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-17 02:28:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:55,920 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-17 02:28:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:28:55,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:28:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:55,922 INFO L225 Difference]: With dead ends: 64 [2020-09-17 02:28:55,922 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 02:28:55,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:28:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 02:28:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 02:28:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:28:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-17 02:28:55,934 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-17 02:28:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:55,934 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-17 02:28:55,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:28:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-17 02:28:55,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:28:55,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:55,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:56,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:56,159 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-17 02:28:56,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:56,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145317056] [2020-09-17 02:28:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:56,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145317056] [2020-09-17 02:28:56,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560444062] [2020-09-17 02:28:56,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:56,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:28:56,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:28:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:56,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:28:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:56,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:56,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:28:56,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750917195] [2020-09-17 02:28:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:28:56,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:28:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:56,415 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-17 02:28:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:56,652 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-17 02:28:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:28:56,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:28:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:56,653 INFO L225 Difference]: With dead ends: 61 [2020-09-17 02:28:56,653 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:28:56,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:28:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:28:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-17 02:28:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:28:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:28:56,659 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-17 02:28:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:56,659 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:28:56,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:28:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:28:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:28:56,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:56,661 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:56,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:56,873 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-17 02:28:56,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:56,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134310582] [2020-09-17 02:28:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:56,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134310582] [2020-09-17 02:28:56,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690265747] [2020-09-17 02:28:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:57,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:28:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:57,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:57,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:28:57,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970963522] [2020-09-17 02:28:57,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:28:57,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:28:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:28:57,040 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-17 02:28:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:57,212 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:28:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:28:57,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:28:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:57,214 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:28:57,214 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:28:57,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:28:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:28:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-17 02:28:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:28:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-17 02:28:57,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-17 02:28:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:57,220 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-17 02:28:57,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:28:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-17 02:28:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:28:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:57,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:57,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 02:28:57,434 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-17 02:28:57,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:57,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112789338] [2020-09-17 02:28:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:57,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112789338] [2020-09-17 02:28:57,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041428554] [2020-09-17 02:28:57,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:57,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:28:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:28:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:57,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:57,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:28:57,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109996681] [2020-09-17 02:28:57,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:28:57,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:28:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:57,598 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-17 02:28:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:57,826 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-09-17 02:28:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:28:57,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:28:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:57,828 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:28:57,828 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:28:57,829 INFO L675 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 [2020-09-17 02:28:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:28:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-09-17 02:28:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-17 02:28:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-17 02:28:57,832 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-17 02:28:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:57,832 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-17 02:28:57,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:28:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-17 02:28:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:28:57,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:57,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:58,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:58,046 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-17 02:28:58,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:58,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284250888] [2020-09-17 02:28:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:58,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284250888] [2020-09-17 02:28:58,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964614645] [2020-09-17 02:28:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:28:58,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:58,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:58,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:58,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:28:58,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300751976] [2020-09-17 02:28:58,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:28:58,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:58,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:28:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:58,256 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-17 02:28:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:58,489 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-17 02:28:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:28:58,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:28:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:58,490 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:28:58,490 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:28:58,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:28:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:28:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-17 02:28:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:28:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:28:58,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-17 02:28:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:58,502 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:28:58,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:28:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:28:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:28:58,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:58,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:58,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:28:58,706 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:58,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-17 02:28:58,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:58,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298095805] [2020-09-17 02:28:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:58,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298095805] [2020-09-17 02:28:58,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802762535] [2020-09-17 02:28:58,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:58,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:28:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:28:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:58,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:28:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:58,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:58,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:28:58,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071101013] [2020-09-17 02:28:58,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:28:58,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:58,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:28:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:28:58,933 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-17 02:28:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:59,197 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-17 02:28:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:28:59,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:28:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:59,199 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:28:59,199 INFO L226 Difference]: Without dead ends: 49 [2020-09-17 02:28:59,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:28:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-17 02:28:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-17 02:28:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 02:28:59,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 02:28:59,203 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-17 02:28:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:59,204 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 02:28:59,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:28:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 02:28:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:28:59,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:59,205 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:28:59,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:28:59,415 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:28:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:28:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-17 02:28:59,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:28:59,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982468199] [2020-09-17 02:28:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:28:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:28:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:59,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982468199] [2020-09-17 02:28:59,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996816629] [2020-09-17 02:28:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:28:59,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:28:59,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:28:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:28:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:28:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:28:59,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:28:59,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:28:59,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938047584] [2020-09-17 02:28:59,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:28:59,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:28:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:28:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:28:59,631 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-17 02:28:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:28:59,781 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-17 02:28:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:28:59,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:28:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:28:59,783 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:28:59,784 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:28:59,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:28:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:28:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 02:28:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:28:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 02:28:59,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-17 02:28:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:28:59,791 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 02:28:59,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:28:59,792 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 02:28:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:28:59,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:28:59,795 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:00,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:29:00,008 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-17 02:29:00,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:00,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261915454] [2020-09-17 02:29:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:00,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261915454] [2020-09-17 02:29:00,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66507055] [2020-09-17 02:29:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:00,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:00,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:29:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:00,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:00,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:00,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:29:00,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345716471] [2020-09-17 02:29:00,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:00,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:00,228 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-17 02:29:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:00,408 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-17 02:29:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:29:00,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:29:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:00,410 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:29:00,410 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:29:00,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:29:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-17 02:29:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:29:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:29:00,415 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-17 02:29:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:00,415 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:29:00,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:29:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:29:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:00,416 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:00,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:29:00,627 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-17 02:29:00,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:00,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327167314] [2020-09-17 02:29:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:00,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327167314] [2020-09-17 02:29:00,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176274673] [2020-09-17 02:29:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:00,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:29:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:29:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:00,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:00,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:29:00,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139369750] [2020-09-17 02:29:00,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:29:00,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:29:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:29:00,807 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-17 02:29:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:01,014 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-17 02:29:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:29:01,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:29:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:01,015 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:29:01,016 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:29:01,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:29:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-17 02:29:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-17 02:29:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-17 02:29:01,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-17 02:29:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:01,021 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-17 02:29:01,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:29:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-17 02:29:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:29:01,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:01,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:01,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:01,224 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-17 02:29:01,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:01,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689199385] [2020-09-17 02:29:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:01,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689199385] [2020-09-17 02:29:01,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706146255] [2020-09-17 02:29:01,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:01,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:29:01,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:29:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:01,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:01,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:01,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:29:01,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607933269] [2020-09-17 02:29:01,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:01,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:01,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:01,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:01,452 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-17 02:29:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:01,725 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-17 02:29:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:29:01,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:29:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:01,726 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:29:01,726 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:29:01,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:29:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:29:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 02:29:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:29:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:29:01,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-17 02:29:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:01,730 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:29:01,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:29:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:29:01,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:01,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:01,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:01,933 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-17 02:29:01,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:01,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68922454] [2020-09-17 02:29:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:02,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68922454] [2020-09-17 02:29:02,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62555502] [2020-09-17 02:29:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:02,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:29:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:02,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:02,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:29:02,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435077725] [2020-09-17 02:29:02,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:29:02,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:29:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:29:02,107 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-17 02:29:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:02,404 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:29:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:02,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:29:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:02,407 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:29:02,407 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:29:02,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:29:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:29:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-17 02:29:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:29:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-17 02:29:02,416 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-17 02:29:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:02,416 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-17 02:29:02,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:29:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-17 02:29:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:29:02,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:02,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:02,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:02,619 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-17 02:29:02,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:02,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835430232] [2020-09-17 02:29:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:02,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835430232] [2020-09-17 02:29:02,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965715264] [2020-09-17 02:29:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:02,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:02,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:29:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:02,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:02,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:02,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:29:02,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450038551] [2020-09-17 02:29:02,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:02,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:02,795 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-17 02:29:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:03,116 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 02:29:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:03,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:29:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:03,119 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:29:03,120 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:29:03,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:29:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:29:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-17 02:29:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:29:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-17 02:29:03,123 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-17 02:29:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:03,123 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-17 02:29:03,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-17 02:29:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:03,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:03,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:03,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:29:03,328 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-17 02:29:03,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:03,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240096899] [2020-09-17 02:29:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:03,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240096899] [2020-09-17 02:29:03,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331872264] [2020-09-17 02:29:03,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:03,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:29:03,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:03,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:03,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:03,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:29:03,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940831683] [2020-09-17 02:29:03,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:03,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:03,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:03,569 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-17 02:29:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:03,724 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 02:29:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:29:03,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:29:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:03,726 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:29:03,726 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:29:03,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:29:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-17 02:29:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:29:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:29:03,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:29:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:03,731 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:29:03,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:29:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:03,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:03,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:03,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 02:29:03,937 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-17 02:29:03,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:03,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102686016] [2020-09-17 02:29:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:04,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102686016] [2020-09-17 02:29:04,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826362109] [2020-09-17 02:29:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:04,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:04,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:04,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:04,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:04,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:29:04,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995138276] [2020-09-17 02:29:04,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:04,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:04,161 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:29:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:04,428 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-17 02:29:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:29:04,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:29:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:04,430 INFO L225 Difference]: With dead ends: 71 [2020-09-17 02:29:04,430 INFO L226 Difference]: Without dead ends: 65 [2020-09-17 02:29:04,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:29:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-17 02:29:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-17 02:29:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:29:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:29:04,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:29:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:04,433 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:29:04,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:29:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:04,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:04,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:04,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:29:04,635 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-17 02:29:04,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:04,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250359988] [2020-09-17 02:29:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:04,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250359988] [2020-09-17 02:29:04,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722243645] [2020-09-17 02:29:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:04,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:29:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:04,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:04,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:29:04,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851391461] [2020-09-17 02:29:04,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:04,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:04,831 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:29:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:05,055 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-17 02:29:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:29:05,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:29:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:05,057 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:29:05,057 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:29:05,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:29:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:29:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-17 02:29:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:29:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:29:05,060 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:29:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:05,061 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:29:05,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:29:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:05,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:05,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:05,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:29:05,270 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-17 02:29:05,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:05,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168875866] [2020-09-17 02:29:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168875866] [2020-09-17 02:29:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440448607] [2020-09-17 02:29:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:05,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:29:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:05,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:05,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:05,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:29:05,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15267646] [2020-09-17 02:29:05,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:05,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:05,480 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:29:05,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:05,847 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-17 02:29:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:05,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:29:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:05,849 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:29:05,849 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:29:05,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:29:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:29:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-17 02:29:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:29:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:29:05,853 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:29:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:29:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:29:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:05,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:05,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:06,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:29:06,063 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-17 02:29:06,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:06,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384904810] [2020-09-17 02:29:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:06,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384904810] [2020-09-17 02:29:06,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862290518] [2020-09-17 02:29:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:06,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:06,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:29:06,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547934068] [2020-09-17 02:29:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:29:06,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:29:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:29:06,231 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:29:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:06,527 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:29:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:06,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:29:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:06,528 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:29:06,528 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:29:06,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:29:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:29:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-17 02:29:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:29:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-17 02:29:06,532 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-17 02:29:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:06,533 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-17 02:29:06,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:29:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-17 02:29:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:06,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:06,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:06,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:06,743 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-17 02:29:06,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:06,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921386296] [2020-09-17 02:29:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:06,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921386296] [2020-09-17 02:29:06,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698327223] [2020-09-17 02:29:06,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:06,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:06,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:06,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:06,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:06,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:29:06,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880397825] [2020-09-17 02:29:06,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:06,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:06,952 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-17 02:29:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:07,304 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-17 02:29:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:07,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:29:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:07,306 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:29:07,306 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:29:07,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:29:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:29:07,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-17 02:29:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-17 02:29:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-17 02:29:07,310 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-17 02:29:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:07,311 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-17 02:29:07,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-17 02:29:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:29:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:07,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:07,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:29:07,522 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-17 02:29:07,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:07,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318899811] [2020-09-17 02:29:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:07,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318899811] [2020-09-17 02:29:07,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337640834] [2020-09-17 02:29:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:07,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:29:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:07,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:29:07,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:07,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:07,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:07,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:29:07,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274925776] [2020-09-17 02:29:07,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:07,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:07,728 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-17 02:29:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:08,131 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-17 02:29:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:08,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:29:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:08,133 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:29:08,133 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:29:08,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:29:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:29:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-17 02:29:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:29:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:29:08,137 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-17 02:29:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:08,137 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:29:08,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:29:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:08,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:08,138 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:08,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 02:29:08,339 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-17 02:29:08,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:08,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233700045] [2020-09-17 02:29:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:08,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233700045] [2020-09-17 02:29:08,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809970919] [2020-09-17 02:29:08,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:08,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:08,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:08,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:08,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:29:08,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840850118] [2020-09-17 02:29:08,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:08,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:08,543 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-17 02:29:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:08,948 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-17 02:29:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:08,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:29:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:08,950 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:29:08,950 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:29:08,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:29:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:29:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-17 02:29:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:29:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 02:29:08,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-17 02:29:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:08,954 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 02:29:08,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 02:29:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:08,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:08,955 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:09,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:09,167 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:09,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-17 02:29:09,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:09,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939028744] [2020-09-17 02:29:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:09,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939028744] [2020-09-17 02:29:09,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320708883] [2020-09-17 02:29:09,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:09,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:29:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:09,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:09,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:09,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:09,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:29:09,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812594933] [2020-09-17 02:29:09,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:09,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:09,375 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-17 02:29:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:09,602 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-17 02:29:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:29:09,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:29:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:09,604 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:29:09,604 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:29:09,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:29:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:29:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 02:29:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:29:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 02:29:09,609 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-17 02:29:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:09,610 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 02:29:09,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 02:29:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:09,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:09,611 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:09,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:09,823 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-17 02:29:09,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:09,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291498936] [2020-09-17 02:29:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:10,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291498936] [2020-09-17 02:29:10,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259671739] [2020-09-17 02:29:10,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:10,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:29:10,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:10,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:10,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:10,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:10,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:10,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:29:10,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667856627] [2020-09-17 02:29:10,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:10,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:10,141 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-17 02:29:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:10,456 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-17 02:29:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:29:10,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:29:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:10,459 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:29:10,462 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:29:10,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:29:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:29:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 02:29:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:29:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-17 02:29:10,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-17 02:29:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:10,468 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-17 02:29:10,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-17 02:29:10,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:10,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:10,469 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:10,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:29:10,682 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-17 02:29:10,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:10,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185282104] [2020-09-17 02:29:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:10,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185282104] [2020-09-17 02:29:10,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100517294] [2020-09-17 02:29:10,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:10,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:10,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:10,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:29:10,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363156130] [2020-09-17 02:29:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:10,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:10,907 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-17 02:29:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:11,139 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-17 02:29:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:11,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:29:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:11,141 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:29:11,141 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:29:11,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:29:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:29:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-17 02:29:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:29:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:29:11,145 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-17 02:29:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:11,146 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:29:11,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:29:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:11,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:11,147 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:11,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:11,357 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-17 02:29:11,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:11,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534484660] [2020-09-17 02:29:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:11,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534484660] [2020-09-17 02:29:11,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214282134] [2020-09-17 02:29:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:11,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:11,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:11,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:11,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:29:11,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908140518] [2020-09-17 02:29:11,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:11,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:11,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:11,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:11,566 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-17 02:29:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:11,901 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-17 02:29:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:11,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:29:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:11,903 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:29:11,903 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:29:11,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:29:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:29:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-17 02:29:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:29:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:29:11,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-17 02:29:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:11,907 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:29:11,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:29:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:11,908 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:12,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:29:12,118 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-17 02:29:12,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:12,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649406728] [2020-09-17 02:29:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:12,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649406728] [2020-09-17 02:29:12,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214855861] [2020-09-17 02:29:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:12,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:29:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:12,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:12,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:12,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:12,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:29:12,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752275895] [2020-09-17 02:29:12,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:12,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:12,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:12,386 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-17 02:29:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:12,788 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-17 02:29:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:29:12,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:29:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:12,790 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:29:12,790 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:29:12,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:29:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:29:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-17 02:29:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:29:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-17 02:29:12,795 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-17 02:29:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:12,795 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-17 02:29:12,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-17 02:29:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:12,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:12,797 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:13,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:13,008 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-17 02:29:13,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:13,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713238169] [2020-09-17 02:29:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:13,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713238169] [2020-09-17 02:29:13,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267255993] [2020-09-17 02:29:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:13,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:13,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:13,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:13,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:29:13,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724103727] [2020-09-17 02:29:13,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:13,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:13,252 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-17 02:29:13,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:13,653 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-17 02:29:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:13,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:29:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:13,655 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:29:13,655 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:29:13,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:29:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:29:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-17 02:29:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:29:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:29:13,658 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-17 02:29:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:13,659 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:29:13,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:29:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:13,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:13,659 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:13,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:29:13,867 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-17 02:29:13,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:13,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472993910] [2020-09-17 02:29:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:13,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472993910] [2020-09-17 02:29:13,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457678331] [2020-09-17 02:29:13,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:14,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:29:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:14,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:14,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:14,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:29:14,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808788652] [2020-09-17 02:29:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:29:14,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:29:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:29:14,051 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-17 02:29:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:14,458 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-17 02:29:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:14,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:29:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:14,461 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:29:14,461 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:29:14,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:29:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:29:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-17 02:29:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:29:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-17 02:29:14,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-17 02:29:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:14,467 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-17 02:29:14,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:29:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-17 02:29:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:29:14,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:14,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:14,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 02:29:14,681 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-17 02:29:14,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:14,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249403342] [2020-09-17 02:29:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:14,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249403342] [2020-09-17 02:29:14,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004277162] [2020-09-17 02:29:14,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:14,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:29:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:29:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:14,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:14,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:14,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:29:14,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010249765] [2020-09-17 02:29:14,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:14,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:14,937 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-17 02:29:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:15,405 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-17 02:29:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:15,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:29:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:15,406 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:29:15,406 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:29:15,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:29:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:29:15,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 02:29:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:29:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-17 02:29:15,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-17 02:29:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:15,410 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-17 02:29:15,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-17 02:29:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:15,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:15,411 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:15,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:29:15,619 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-17 02:29:15,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:15,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574616750] [2020-09-17 02:29:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:15,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574616750] [2020-09-17 02:29:15,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163033990] [2020-09-17 02:29:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:15,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:15,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:29:15,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914567698] [2020-09-17 02:29:15,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:15,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:15,844 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-17 02:29:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:16,064 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:29:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:29:16,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:29:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:16,065 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:29:16,065 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:29:16,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:29:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:29:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-17 02:29:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:29:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:29:16,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:29:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:16,069 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:29:16,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:29:16,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:16,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:16,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:16,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:29:16,271 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:16,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-17 02:29:16,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:16,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715236828] [2020-09-17 02:29:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:16,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715236828] [2020-09-17 02:29:16,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107517644] [2020-09-17 02:29:16,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:16,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:16,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:16,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:29:16,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587620800] [2020-09-17 02:29:16,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:16,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:16,529 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:29:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:16,867 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 02:29:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:16,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:29:16,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:16,869 INFO L225 Difference]: With dead ends: 81 [2020-09-17 02:29:16,869 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:29:16,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:29:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:29:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-17 02:29:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:29:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:29:16,873 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:29:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:16,873 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:29:16,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:29:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:16,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:16,874 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:17,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:29:17,084 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-17 02:29:17,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:17,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800484870] [2020-09-17 02:29:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:17,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800484870] [2020-09-17 02:29:17,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908130088] [2020-09-17 02:29:17,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:17,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:29:17,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:17,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:17,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:29:17,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783581083] [2020-09-17 02:29:17,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:17,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:17,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:17,305 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:29:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:17,616 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:29:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:17,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:29:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:17,617 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:29:17,617 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:29:17,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:29:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:29:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-17 02:29:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:29:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:29:17,620 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:29:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:17,620 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:29:17,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:29:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:17,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:17,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:17,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:29:17,822 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-17 02:29:17,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:17,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891231394] [2020-09-17 02:29:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:17,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891231394] [2020-09-17 02:29:17,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486663115] [2020-09-17 02:29:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:18,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:18,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:18,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:18,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:18,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:18,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:18,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:29:18,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323066871] [2020-09-17 02:29:18,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:18,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:18,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:18,054 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:29:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:18,459 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:29:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:18,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:29:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:18,461 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:29:18,461 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:29:18,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:29:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:29:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-17 02:29:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:29:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:29:18,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:29:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:18,465 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:29:18,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:29:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:18,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:18,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:18,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-17 02:29:18,667 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:18,668 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-17 02:29:18,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:18,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183853444] [2020-09-17 02:29:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183853444] [2020-09-17 02:29:18,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312961310] [2020-09-17 02:29:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:18,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:29:18,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:18,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:18,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:18,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:29:18,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975897650] [2020-09-17 02:29:18,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:18,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:18,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:18,893 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:29:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:19,265 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-17 02:29:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:29:19,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:29:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:19,267 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:29:19,268 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:29:19,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:29:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:29:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-17 02:29:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:29:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:29:19,272 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:29:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:19,272 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:29:19,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:29:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:19,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:19,273 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:19,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:19,482 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:19,483 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-17 02:29:19,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:19,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88728471] [2020-09-17 02:29:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:19,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88728471] [2020-09-17 02:29:19,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290628006] [2020-09-17 02:29:19,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:19,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:29:19,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:19,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:19,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:19,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:29:19,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643184504] [2020-09-17 02:29:19,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:19,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:19,697 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:29:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:20,204 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-17 02:29:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:20,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:29:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:20,205 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:29:20,205 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:29:20,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:29:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:29:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-17 02:29:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:29:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:29:20,211 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:29:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:20,211 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:29:20,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:29:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:20,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:20,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:20,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:29:20,413 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-17 02:29:20,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:20,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124663595] [2020-09-17 02:29:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:20,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124663595] [2020-09-17 02:29:20,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618436132] [2020-09-17 02:29:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:20,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:20,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:29:20,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628267535] [2020-09-17 02:29:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:29:20,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:29:20,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:29:20,622 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:29:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:21,071 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:29:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:21,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:29:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:21,073 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:29:21,073 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:29:21,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:29:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:29:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 02:29:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:29:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-17 02:29:21,076 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-17 02:29:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:21,077 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-17 02:29:21,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:29:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-17 02:29:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:21,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:21,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:21,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:21,288 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-17 02:29:21,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:21,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401439049] [2020-09-17 02:29:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:21,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401439049] [2020-09-17 02:29:21,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841000941] [2020-09-17 02:29:21,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:21,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:21,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:21,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:21,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:21,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:21,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:29:21,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607396909] [2020-09-17 02:29:21,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:21,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:21,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:21,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:21,495 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-17 02:29:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:21,978 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-17 02:29:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:21,979 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:29:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:21,980 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:29:21,980 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:29:21,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:29:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:29:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-17 02:29:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:29:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-17 02:29:21,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-17 02:29:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:21,983 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-17 02:29:21,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-17 02:29:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:29:21,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:21,984 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:22,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:29:22,193 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-17 02:29:22,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:22,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161321053] [2020-09-17 02:29:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:22,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161321053] [2020-09-17 02:29:22,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912023457] [2020-09-17 02:29:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:22,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:29:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:29:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:22,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:22,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:22,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:29:22,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054041109] [2020-09-17 02:29:22,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:22,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:22,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:22,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:22,415 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-17 02:29:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:22,953 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-17 02:29:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:22,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:29:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:22,955 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:29:22,955 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:29:22,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:29:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:29:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-17 02:29:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:29:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:29:22,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-17 02:29:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:22,959 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:29:22,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:29:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:22,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:22,960 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:23,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:23,169 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-17 02:29:23,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:23,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371918716] [2020-09-17 02:29:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:23,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371918716] [2020-09-17 02:29:23,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715451798] [2020-09-17 02:29:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:23,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:23,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:23,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:23,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:23,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:23,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053597438] [2020-09-17 02:29:23,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:23,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:23,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:23,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:23,404 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-17 02:29:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:23,942 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-17 02:29:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:23,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:23,944 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:29:23,944 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:29:23,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:29:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:29:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-17 02:29:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:29:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 02:29:23,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-17 02:29:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:23,949 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 02:29:23,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 02:29:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:23,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:23,949 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:24,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:29:24,157 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:24,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-17 02:29:24,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:24,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515954480] [2020-09-17 02:29:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:24,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515954480] [2020-09-17 02:29:24,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25041670] [2020-09-17 02:29:24,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:24,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:29:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:24,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:24,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:29:24,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372210432] [2020-09-17 02:29:24,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:24,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:24,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:24,387 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-17 02:29:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:24,653 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-17 02:29:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:29:24,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:29:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:24,655 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:29:24,655 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 02:29:24,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:29:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 02:29:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 02:29:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:29:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 02:29:24,659 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-17 02:29:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:24,660 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 02:29:24,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 02:29:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:24,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:24,661 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:24,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:29:24,872 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:24,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-17 02:29:24,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:24,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349846003] [2020-09-17 02:29:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:25,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349846003] [2020-09-17 02:29:25,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270009299] [2020-09-17 02:29:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:25,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:29:25,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:25,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:25,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:25,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:25,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:25,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:25,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063782925] [2020-09-17 02:29:25,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:25,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:25,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:25,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:25,163 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-17 02:29:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:25,440 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-17 02:29:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:29:25,441 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:25,442 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:29:25,442 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 02:29:25,442 INFO L675 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 [2020-09-17 02:29:25,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 02:29:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 02:29:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:29:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-17 02:29:25,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-17 02:29:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:25,447 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-17 02:29:25,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:25,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-17 02:29:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:25,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:25,447 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:25,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:29:25,656 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-17 02:29:25,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:25,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669195300] [2020-09-17 02:29:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:25,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669195300] [2020-09-17 02:29:25,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419036663] [2020-09-17 02:29:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:25,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:25,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:25,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:25,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:29:25,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948857695] [2020-09-17 02:29:25,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:25,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:25,922 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-17 02:29:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:26,231 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-17 02:29:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:29:26,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:29:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:26,232 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:29:26,233 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:29:26,233 INFO L675 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 [2020-09-17 02:29:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:29:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-17 02:29:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:29:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-17 02:29:26,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-17 02:29:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:26,237 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-17 02:29:26,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-17 02:29:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:26,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:26,239 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:26,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:29:26,449 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:26,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:26,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-17 02:29:26,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:26,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931863339] [2020-09-17 02:29:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:26,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931863339] [2020-09-17 02:29:26,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040141707] [2020-09-17 02:29:26,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:26,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:26,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:26,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:26,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:26,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649892773] [2020-09-17 02:29:26,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:26,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:26,726 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-17 02:29:27,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:27,103 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-17 02:29:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:27,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:27,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:27,109 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:29:27,109 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:29:27,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:29:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:29:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-17 02:29:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:29:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-17 02:29:27,115 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-17 02:29:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:27,115 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-17 02:29:27,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-17 02:29:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:27,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:27,116 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:27,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:27,325 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:27,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-17 02:29:27,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:27,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277694824] [2020-09-17 02:29:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:27,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277694824] [2020-09-17 02:29:27,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735675311] [2020-09-17 02:29:27,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:27,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:29:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:27,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:27,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:29:27,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093446562] [2020-09-17 02:29:27,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:27,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:27,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:27,584 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-17 02:29:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:27,980 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-17 02:29:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:27,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:29:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:27,981 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:29:27,981 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:29:27,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:29:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:29:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-17 02:29:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:29:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:29:27,984 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-17 02:29:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:27,984 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:29:27,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:29:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:27,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:27,985 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:28,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:28,194 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-17 02:29:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112328782] [2020-09-17 02:29:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:28,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112328782] [2020-09-17 02:29:28,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567330567] [2020-09-17 02:29:28,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:28,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:28,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:28,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:28,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214351517] [2020-09-17 02:29:28,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:28,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:28,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:28,421 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-17 02:29:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:28,878 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-17 02:29:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:28,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:28,880 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:29:28,881 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:29:28,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:29:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:29:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-17 02:29:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:29:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:29:28,884 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-17 02:29:28,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:28,885 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:29:28,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:29:28,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:28,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:28,885 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:29,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 02:29:29,086 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-17 02:29:29,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:29,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995861948] [2020-09-17 02:29:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:29,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995861948] [2020-09-17 02:29:29,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130558877] [2020-09-17 02:29:29,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:29,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:29:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:29,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:29,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:29,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:29:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538732893] [2020-09-17 02:29:29,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:29,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:29,304 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-17 02:29:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:29,746 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-17 02:29:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:29:29,747 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:29:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:29,748 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:29:29,748 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:29:29,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:29:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:29:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-17 02:29:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:29:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-17 02:29:29,751 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-17 02:29:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:29,751 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-17 02:29:29,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-17 02:29:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:29,752 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:29,752 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:29,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:29,961 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-17 02:29:29,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:29,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461342235] [2020-09-17 02:29:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:30,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461342235] [2020-09-17 02:29:30,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919249813] [2020-09-17 02:29:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:30,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:29:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:30,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:30,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:30,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:30,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473963569] [2020-09-17 02:29:30,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:30,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:30,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:30,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:30,218 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-17 02:29:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:30,805 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-17 02:29:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:29:30,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:30,807 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:29:30,808 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:29:30,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:29:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:29:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-17 02:29:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:29:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:29:30,812 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-17 02:29:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:30,812 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:29:30,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:29:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:30,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:30,813 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:31,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:29:31,024 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-17 02:29:31,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:31,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535842704] [2020-09-17 02:29:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:31,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535842704] [2020-09-17 02:29:31,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783921246] [2020-09-17 02:29:31,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:31,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:31,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:29:31,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408054229] [2020-09-17 02:29:31,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:29:31,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:29:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:29:31,232 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-17 02:29:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:31,735 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:29:31,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:29:31,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:29:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:31,737 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:29:31,737 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:29:31,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:29:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:29:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-17 02:29:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:29:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-17 02:29:31,740 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-17 02:29:31,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:31,740 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-17 02:29:31,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:29:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-17 02:29:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:29:31,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:31,741 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:31,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 02:29:31,950 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:31,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-17 02:29:31,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:31,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185762683] [2020-09-17 02:29:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185762683] [2020-09-17 02:29:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696218039] [2020-09-17 02:29:32,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:32,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:32,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:29:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:32,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:29:32,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132493828] [2020-09-17 02:29:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:32,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:32,169 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-17 02:29:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:32,793 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-17 02:29:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:29:32,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:29:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:32,794 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:29:32,794 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:29:32,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:29:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:29:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-17 02:29:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:29:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-17 02:29:32,797 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-17 02:29:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:32,797 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-17 02:29:32,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-17 02:29:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:32,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:32,798 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:32,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:29:32,999 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-17 02:29:33,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:33,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698765787] [2020-09-17 02:29:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:33,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698765787] [2020-09-17 02:29:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975257098] [2020-09-17 02:29:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:33,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:29:33,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:33,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:33,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:29:33,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445862623] [2020-09-17 02:29:33,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:33,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:33,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:33,292 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-17 02:29:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:33,538 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:29:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:33,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:29:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:33,540 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:29:33,540 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:29:33,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:29:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:29:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-17 02:29:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:29:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:29:33,543 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:29:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:33,543 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:29:33,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:29:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:33,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:33,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:33,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:29:33,754 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-17 02:29:33,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:33,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648353275] [2020-09-17 02:29:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:33,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648353275] [2020-09-17 02:29:33,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21987728] [2020-09-17 02:29:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:34,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:34,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:34,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:34,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:34,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:34,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671440504] [2020-09-17 02:29:34,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:34,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:34,042 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:29:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:34,442 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-17 02:29:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:34,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:34,444 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:29:34,444 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:29:34,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:29:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:29:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:29:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:29:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:29:34,447 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:29:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:34,447 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:29:34,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:29:34,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:34,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:34,448 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:34,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:29:34,649 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:34,650 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-17 02:29:34,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:34,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196631245] [2020-09-17 02:29:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:34,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196631245] [2020-09-17 02:29:34,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193250414] [2020-09-17 02:29:34,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:34,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:29:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:34,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:34,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:34,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:29:34,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211222587] [2020-09-17 02:29:34,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:34,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:34,887 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:29:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:35,255 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:29:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:29:35,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:29:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:35,257 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:29:35,257 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:29:35,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:29:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:29:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-17 02:29:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:29:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:29:35,260 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:29:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:35,260 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:29:35,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:29:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:35,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:35,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:35,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:35,469 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:35,470 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-17 02:29:35,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:35,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626570789] [2020-09-17 02:29:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:35,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626570789] [2020-09-17 02:29:35,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546077899] [2020-09-17 02:29:35,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:35,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:29:35,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:35,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:35,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:35,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:35,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:35,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949892131] [2020-09-17 02:29:35,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:35,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:35,749 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:29:36,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:36,218 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-17 02:29:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:36,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:36,220 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:29:36,220 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:29:36,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:29:36,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:29:36,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-17 02:29:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:29:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:29:36,223 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:29:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:36,223 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:29:36,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:29:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:36,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:36,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:36,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:36,424 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-17 02:29:36,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:36,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875486762] [2020-09-17 02:29:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:36,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875486762] [2020-09-17 02:29:36,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647747144] [2020-09-17 02:29:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:36,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:36,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:29:36,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152379981] [2020-09-17 02:29:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:36,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:36,668 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:29:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:37,091 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-17 02:29:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:37,092 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:29:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:37,094 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:29:37,094 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:29:37,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:29:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:29:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-17 02:29:37,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:29:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:29:37,098 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:29:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:37,098 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:29:37,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:29:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:37,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:37,099 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:37,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 02:29:37,305 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-17 02:29:37,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:37,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487618383] [2020-09-17 02:29:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:37,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487618383] [2020-09-17 02:29:37,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904867463] [2020-09-17 02:29:37,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:37,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:37,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:37,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:37,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:37,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227219822] [2020-09-17 02:29:37,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:37,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:37,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:37,560 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:29:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:38,159 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:29:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:29:38,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:38,160 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:29:38,160 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:29:38,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:29:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:29:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-17 02:29:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:29:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:29:38,163 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:29:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:38,163 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:29:38,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:29:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:38,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:38,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:38,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:38,369 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:38,369 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-17 02:29:38,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:38,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744651093] [2020-09-17 02:29:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:38,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744651093] [2020-09-17 02:29:38,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689989872] [2020-09-17 02:29:38,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:38,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:29:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:38,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:38,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:29:38,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47056213] [2020-09-17 02:29:38,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:38,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:38,609 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:29:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:39,103 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-17 02:29:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:29:39,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:29:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:39,104 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:29:39,105 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:29:39,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:29:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:29:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-17 02:29:39,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:29:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:29:39,107 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:29:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:39,108 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:29:39,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:29:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:39,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:39,108 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:39,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:29:39,309 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-17 02:29:39,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:39,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877711292] [2020-09-17 02:29:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:39,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877711292] [2020-09-17 02:29:39,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210984008] [2020-09-17 02:29:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:39,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:39,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:39,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:39,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:39,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:39,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567653760] [2020-09-17 02:29:39,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:39,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:39,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:39,577 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:29:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:40,245 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-17 02:29:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:29:40,246 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:40,247 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:29:40,247 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:29:40,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:29:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:29:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-17 02:29:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:29:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:29:40,251 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:29:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:40,251 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:29:40,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:29:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:40,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:40,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:40,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:40,462 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-17 02:29:40,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:40,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400173611] [2020-09-17 02:29:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:40,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400173611] [2020-09-17 02:29:40,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300135846] [2020-09-17 02:29:40,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:40,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:29:40,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:40,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:40,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:29:40,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932874816] [2020-09-17 02:29:40,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:29:40,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:40,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:29:40,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:29:40,679 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:29:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:41,231 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:29:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:29:41,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:29:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:41,233 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:29:41,233 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:29:41,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:29:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:29:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-17 02:29:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:29:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-17 02:29:41,236 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-17 02:29:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:41,236 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-17 02:29:41,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:29:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-17 02:29:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:41,237 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:41,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:29:41,438 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-17 02:29:41,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:41,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722677626] [2020-09-17 02:29:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:41,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722677626] [2020-09-17 02:29:41,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783520877] [2020-09-17 02:29:41,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:41,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:29:41,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:41,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:41,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:41,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:41,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:41,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432312590] [2020-09-17 02:29:41,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:41,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:41,694 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-17 02:29:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:42,393 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-17 02:29:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:29:42,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:42,395 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:29:42,395 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:29:42,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:29:42,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:29:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-17 02:29:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:29:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-17 02:29:42,398 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-17 02:29:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:42,398 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-17 02:29:42,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-17 02:29:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:29:42,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:42,399 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:42,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:42,600 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-17 02:29:42,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:42,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323244304] [2020-09-17 02:29:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:42,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323244304] [2020-09-17 02:29:42,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200616631] [2020-09-17 02:29:42,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:42,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:29:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:42,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:42,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:42,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:29:42,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460986972] [2020-09-17 02:29:42,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:42,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:42,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:42,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:42,848 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-17 02:29:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:43,498 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-17 02:29:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:29:43,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:29:43,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:43,500 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:29:43,500 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:29:43,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:29:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:29:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-17 02:29:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:29:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:29:43,503 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-17 02:29:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:43,504 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:29:43,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:29:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:43,504 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:43,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:29:43,706 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-17 02:29:43,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:43,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876854261] [2020-09-17 02:29:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:43,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876854261] [2020-09-17 02:29:43,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728297375] [2020-09-17 02:29:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:43,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:43,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:43,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:29:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:43,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:43,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:43,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991009390] [2020-09-17 02:29:43,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:43,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:43,952 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-17 02:29:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:44,656 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-17 02:29:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:29:44,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:44,658 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:29:44,658 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:29:44,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:29:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:29:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-17 02:29:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:29:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 02:29:44,660 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-17 02:29:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:44,661 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 02:29:44,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 02:29:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:44,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:44,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-17 02:29:44,863 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-17 02:29:44,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:44,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391510494] [2020-09-17 02:29:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:45,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391510494] [2020-09-17 02:29:45,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675883676] [2020-09-17 02:29:45,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:45,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:29:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:45,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:45,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:45,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:45,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687166633] [2020-09-17 02:29:45,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:45,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:45,149 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-17 02:29:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:45,461 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-17 02:29:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:29:45,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:45,463 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:29:45,463 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:29:45,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:29:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:29:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 02:29:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:29:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 02:29:45,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-17 02:29:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:45,466 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 02:29:45,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 02:29:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:45,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:45,467 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:45,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:45,668 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-17 02:29:45,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:45,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514632022] [2020-09-17 02:29:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:45,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514632022] [2020-09-17 02:29:45,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567051222] [2020-09-17 02:29:45,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:45,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:45,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:45,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:45,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:45,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202977231] [2020-09-17 02:29:45,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:45,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:45,962 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-17 02:29:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:46,314 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-17 02:29:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:29:46,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:46,316 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:29:46,316 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:29:46,316 INFO L675 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 [2020-09-17 02:29:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:29:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-17 02:29:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:29:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-17 02:29:46,318 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-17 02:29:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:46,318 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-17 02:29:46,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-17 02:29:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:46,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:46,321 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:46,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:46,530 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:46,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-17 02:29:46,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:46,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712226117] [2020-09-17 02:29:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:46,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712226117] [2020-09-17 02:29:46,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180328798] [2020-09-17 02:29:46,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:46,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:29:46,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:46,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:46,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:46,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128977002] [2020-09-17 02:29:46,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:46,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:46,814 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-17 02:29:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:47,244 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-17 02:29:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:29:47,245 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:47,246 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:29:47,246 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:29:47,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:29:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:29:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-17 02:29:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:29:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-17 02:29:47,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-17 02:29:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:47,249 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-17 02:29:47,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-17 02:29:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:47,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:47,250 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:47,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:47,460 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-17 02:29:47,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:47,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844082722] [2020-09-17 02:29:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:47,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844082722] [2020-09-17 02:29:47,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291519853] [2020-09-17 02:29:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:47,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:29:47,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:47,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:47,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:47,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:47,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188002039] [2020-09-17 02:29:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:47,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:47,740 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-17 02:29:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:48,182 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-17 02:29:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:48,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:48,184 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:29:48,184 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:29:48,184 INFO L675 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 [2020-09-17 02:29:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:29:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-17 02:29:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:29:48,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-17 02:29:48,187 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-17 02:29:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:48,187 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-17 02:29:48,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-17 02:29:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:48,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:48,188 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:48,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:48,388 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-17 02:29:48,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:48,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085831053] [2020-09-17 02:29:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:48,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085831053] [2020-09-17 02:29:48,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748186253] [2020-09-17 02:29:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:48,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:48,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:48,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370992567] [2020-09-17 02:29:48,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:48,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:48,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:48,685 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-17 02:29:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:49,156 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:29:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:29:49,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:49,157 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:29:49,158 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:29:49,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:29:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:29:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-17 02:29:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:29:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-17 02:29:49,161 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-17 02:29:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:49,161 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-17 02:29:49,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-17 02:29:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:49,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:49,161 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:49,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:29:49,362 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-17 02:29:49,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:49,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352881438] [2020-09-17 02:29:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:49,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352881438] [2020-09-17 02:29:49,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424348962] [2020-09-17 02:29:49,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:49,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:49,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:49,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:49,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:49,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:49,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:49,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:49,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123673002] [2020-09-17 02:29:49,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:49,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:49,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:49,654 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-17 02:29:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:50,227 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-17 02:29:50,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:29:50,228 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:50,229 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:29:50,229 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:29:50,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:29:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:29:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-17 02:29:50,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:29:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-17 02:29:50,232 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-17 02:29:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:50,233 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-17 02:29:50,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-17 02:29:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:50,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:50,233 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:50,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:50,434 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-17 02:29:50,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:50,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053816313] [2020-09-17 02:29:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:50,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053816313] [2020-09-17 02:29:50,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148481685] [2020-09-17 02:29:50,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:50,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:29:50,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:50,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:50,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:50,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:50,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240630579] [2020-09-17 02:29:50,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:50,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:50,691 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-17 02:29:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:51,214 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-17 02:29:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:29:51,215 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:51,216 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:29:51,216 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:29:51,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:29:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:29:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-17 02:29:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:29:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:29:51,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-17 02:29:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:51,219 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:29:51,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:29:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:51,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:51,219 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:51,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:29:51,420 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-17 02:29:51,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:51,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163939477] [2020-09-17 02:29:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:51,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163939477] [2020-09-17 02:29:51,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542484625] [2020-09-17 02:29:51,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:51,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:51,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:51,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:51,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966223989] [2020-09-17 02:29:51,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:51,725 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-17 02:29:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:52,455 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:29:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:29:52,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:52,457 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:29:52,457 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:29:52,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:29:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:29:52,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-17 02:29:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:29:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:29:52,461 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-17 02:29:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:52,462 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:29:52,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:29:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:52,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:52,463 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:52,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:52,673 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-17 02:29:52,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:52,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692529729] [2020-09-17 02:29:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:52,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692529729] [2020-09-17 02:29:52,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020781042] [2020-09-17 02:29:52,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:52,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:29:52,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:52,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:52,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:52,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:52,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763972699] [2020-09-17 02:29:52,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:52,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:52,986 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-17 02:29:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:53,686 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-17 02:29:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:29:53,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:53,687 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:29:53,688 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:29:53,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:29:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:29:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-17 02:29:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:29:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-17 02:29:53,691 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-17 02:29:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:53,691 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-17 02:29:53,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-17 02:29:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:53,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:53,692 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:53,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:29:53,892 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-17 02:29:53,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:53,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272037245] [2020-09-17 02:29:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:54,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272037245] [2020-09-17 02:29:54,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575500537] [2020-09-17 02:29:54,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:54,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:29:54,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:54,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:54,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:54,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:54,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916209920] [2020-09-17 02:29:54,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:54,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:54,183 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-17 02:29:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:54,902 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-17 02:29:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:29:54,903 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:54,904 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:29:54,904 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:29:54,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:29:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:29:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-17 02:29:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:29:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:29:54,907 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-17 02:29:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:54,907 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:29:54,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:29:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:54,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:54,908 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:55,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:55,119 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:55,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-17 02:29:55,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:55,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659849988] [2020-09-17 02:29:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:55,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659849988] [2020-09-17 02:29:55,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592173325] [2020-09-17 02:29:55,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:29:55,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:55,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:55,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:29:55,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631571856] [2020-09-17 02:29:55,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:29:55,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:29:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:29:55,365 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-17 02:29:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:56,018 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-17 02:29:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:29:56,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:29:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:56,020 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:29:56,020 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:29:56,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:29:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:29:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-17 02:29:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:29:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-17 02:29:56,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-17 02:29:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:56,023 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-17 02:29:56,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:29:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-17 02:29:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:29:56,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:56,024 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:56,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:56,226 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:56,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-17 02:29:56,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:56,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652289293] [2020-09-17 02:29:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:56,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652289293] [2020-09-17 02:29:56,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862837160] [2020-09-17 02:29:56,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:56,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:29:56,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:29:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:56,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:56,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:29:56,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365863470] [2020-09-17 02:29:56,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:56,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:56,498 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-17 02:29:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:57,307 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-17 02:29:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:29:57,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:29:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:57,309 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:29:57,309 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:29:57,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:29:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:29:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-17 02:29:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:29:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-17 02:29:57,312 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-17 02:29:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:57,312 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-17 02:29:57,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-17 02:29:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:29:57,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:57,313 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:57,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:57,514 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:57,515 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-17 02:29:57,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:57,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754856749] [2020-09-17 02:29:57,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:57,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754856749] [2020-09-17 02:29:57,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804425506] [2020-09-17 02:29:57,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:57,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:29:57,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:29:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:57,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:57,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:29:57,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812591364] [2020-09-17 02:29:57,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:57,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:57,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:57,832 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-17 02:29:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:58,217 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-17 02:29:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:29:58,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:29:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:58,219 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:29:58,220 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:29:58,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:29:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:29:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:29:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:29:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:29:58,223 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:29:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:58,223 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:29:58,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:29:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:29:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:29:58,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:58,224 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:58,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:58,434 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-17 02:29:58,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:58,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746116797] [2020-09-17 02:29:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:58,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746116797] [2020-09-17 02:29:58,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359687081] [2020-09-17 02:29:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:58,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:29:58,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:29:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:58,868 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:29:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:58,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:58,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:29:58,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382164646] [2020-09-17 02:29:58,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:29:58,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:29:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:29:58,889 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:29:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:29:59,424 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-17 02:29:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:29:59,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:29:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:29:59,426 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:29:59,427 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:29:59,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:29:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:29:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-17 02:29:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:29:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:29:59,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:29:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:29:59,430 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:29:59,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:29:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:29:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:29:59,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:29:59,432 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:29:59,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:29:59,641 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:29:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:29:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-17 02:29:59,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:29:59,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356424580] [2020-09-17 02:29:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:29:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:29:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:59,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356424580] [2020-09-17 02:29:59,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284638499] [2020-09-17 02:29:59,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:29:59,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:29:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:29:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:29:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:29:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:29:59,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:29:59,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:29:59,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624796029] [2020-09-17 02:29:59,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:29:59,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:29:59,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:29:59,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:29:59,998 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:30:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:00,486 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-17 02:30:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:30:00,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:30:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:00,488 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:30:00,488 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:30:00,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:30:00,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:30:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-17 02:30:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:30:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:30:00,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:30:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:00,494 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:30:00,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:30:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:30:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:00,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:00,495 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:00,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:00,706 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-17 02:30:00,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:00,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590195183] [2020-09-17 02:30:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:00,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590195183] [2020-09-17 02:30:00,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566260355] [2020-09-17 02:30:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:00,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:30:00,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:00,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:01,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:01,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:01,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:01,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345891711] [2020-09-17 02:30:01,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:01,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:01,027 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:30:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:01,603 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 02:30:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:30:01,604 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:01,605 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:30:01,606 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:30:01,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:30:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:30:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-17 02:30:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:30:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:30:01,609 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:30:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:01,610 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:30:01,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:30:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:01,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:01,611 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:01,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:01,814 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-17 02:30:01,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:01,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901396139] [2020-09-17 02:30:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:02,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901396139] [2020-09-17 02:30:02,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22050872] [2020-09-17 02:30:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:02,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:02,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:30:02,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672642132] [2020-09-17 02:30:02,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:30:02,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:30:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:30:02,112 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:30:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:02,644 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-17 02:30:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:30:02,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:30:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:02,646 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:30:02,647 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:30:02,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:30:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:30:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-17 02:30:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:30:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:30:02,650 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:30:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:02,651 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:30:02,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:30:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:30:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:02,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:02,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:02,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 02:30:02,862 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-17 02:30:02,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:02,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983826970] [2020-09-17 02:30:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:03,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983826970] [2020-09-17 02:30:03,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251424915] [2020-09-17 02:30:03,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:03,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:03,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:03,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:03,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:03,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:03,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965794492] [2020-09-17 02:30:03,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:03,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:03,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:03,202 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:30:03,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:03,897 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-17 02:30:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:30:03,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:03,899 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:30:03,899 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:30:03,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:30:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:30:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-17 02:30:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:30:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:30:03,902 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:30:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:03,903 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:30:03,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:30:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:03,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:03,904 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:04,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:04,105 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-17 02:30:04,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:04,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591572536] [2020-09-17 02:30:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:04,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591572536] [2020-09-17 02:30:04,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085869092] [2020-09-17 02:30:04,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:04,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:30:04,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:04,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:04,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:04,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:30:04,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262610030] [2020-09-17 02:30:04,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:30:04,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:30:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:30:04,398 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:30:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:04,992 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-17 02:30:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:30:04,993 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:30:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:04,994 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:30:04,995 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:30:04,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:30:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:30:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-17 02:30:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:30:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:30:04,998 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:30:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:04,999 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:30:04,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:30:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:30:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:04,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:05,000 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:05,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:30:05,209 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-17 02:30:05,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:05,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462418500] [2020-09-17 02:30:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:05,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462418500] [2020-09-17 02:30:05,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661198017] [2020-09-17 02:30:05,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:05,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:05,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:05,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:05,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:05,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:05,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413675670] [2020-09-17 02:30:05,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:05,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:05,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:05,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:05,503 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:30:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:06,313 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:30:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:30:06,314 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:06,315 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:30:06,315 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:30:06,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:30:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:30:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-17 02:30:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:30:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:30:06,319 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:30:06,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:06,320 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:30:06,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:30:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:06,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:06,320 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:06,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:06,523 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-17 02:30:06,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:06,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964538749] [2020-09-17 02:30:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:06,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964538749] [2020-09-17 02:30:06,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643900600] [2020-09-17 02:30:06,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:06,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:30:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:06,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:06,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:06,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:30:06,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964042618] [2020-09-17 02:30:06,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:30:06,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:30:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:30:06,828 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:30:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:07,491 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-17 02:30:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:30:07,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:30:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:07,492 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:30:07,493 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:30:07,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:30:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:30:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-17 02:30:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:30:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:30:07,496 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:30:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:07,496 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:30:07,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:30:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:30:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:07,497 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:07,497 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:07,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:07,706 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-17 02:30:07,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:07,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311701343] [2020-09-17 02:30:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:07,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311701343] [2020-09-17 02:30:07,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229490492] [2020-09-17 02:30:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:07,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:30:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:07,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:08,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:08,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:08,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258682387] [2020-09-17 02:30:08,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:08,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:08,006 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:30:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:08,940 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-17 02:30:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:30:08,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:08,941 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:30:08,941 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:30:08,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:30:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:30:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-17 02:30:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:30:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:30:08,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:30:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:08,944 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:30:08,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:30:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:08,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:08,945 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:09,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:09,145 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-17 02:30:09,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:09,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58431101] [2020-09-17 02:30:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:09,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58431101] [2020-09-17 02:30:09,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238822283] [2020-09-17 02:30:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:09,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:09,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:30:09,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782545631] [2020-09-17 02:30:09,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:30:09,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:09,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:30:09,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:30:09,422 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:30:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:10,154 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:30:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:30:10,155 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:30:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:10,156 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:30:10,156 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:30:10,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:30:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:30:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-17 02:30:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:30:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-17 02:30:10,159 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-17 02:30:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:10,159 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-17 02:30:10,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:30:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-17 02:30:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:10,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:10,160 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:10,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:10,361 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-17 02:30:10,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:10,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644781700] [2020-09-17 02:30:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:10,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:10,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644781700] [2020-09-17 02:30:10,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426002436] [2020-09-17 02:30:10,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:10,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:10,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:10,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:10,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:10,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:10,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953675315] [2020-09-17 02:30:10,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:10,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:10,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:10,655 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-17 02:30:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:11,621 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-17 02:30:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:30:11,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:11,623 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:30:11,623 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:30:11,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:30:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:30:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-17 02:30:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:30:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-17 02:30:11,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-17 02:30:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:11,626 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-17 02:30:11,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-17 02:30:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:30:11,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:11,627 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:11,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:11,835 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-17 02:30:11,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:11,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680103836] [2020-09-17 02:30:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:12,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680103836] [2020-09-17 02:30:12,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486437192] [2020-09-17 02:30:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:12,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:30:12,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:12,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:30:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:12,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:12,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:12,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:30:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359194714] [2020-09-17 02:30:12,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:12,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:12,146 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-17 02:30:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:13,022 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:30:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:30:13,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:30:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:13,024 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:30:13,024 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:30:13,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:30:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:30:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-17 02:30:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:30:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:30:13,027 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-17 02:30:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:13,028 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:30:13,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:30:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:13,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:13,029 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:13,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:13,230 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:13,230 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-17 02:30:13,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:13,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579743374] [2020-09-17 02:30:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:13,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579743374] [2020-09-17 02:30:13,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863797372] [2020-09-17 02:30:13,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:13,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:13,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:13,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:13,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:13,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186469926] [2020-09-17 02:30:13,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:13,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:13,569 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-17 02:30:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:14,570 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-17 02:30:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:30:14,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:14,572 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:30:14,572 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:30:14,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:30:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:30:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-17 02:30:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:30:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 02:30:14,576 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-17 02:30:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:14,576 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 02:30:14,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 02:30:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:14,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:14,577 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:14,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 02:30:14,786 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:14,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-17 02:30:14,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:14,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299800258] [2020-09-17 02:30:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:15,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299800258] [2020-09-17 02:30:15,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779780160] [2020-09-17 02:30:15,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:15,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:30:15,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:15,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:15,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:15,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:15,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298843608] [2020-09-17 02:30:15,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:15,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:15,156 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-17 02:30:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:15,552 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:30:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:30:15,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:15,554 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:30:15,554 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:30:15,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:30:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:30:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 02:30:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:30:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 02:30:15,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-17 02:30:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:15,556 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 02:30:15,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 02:30:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:15,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:15,557 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:15,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:15,758 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:15,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:15,759 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-17 02:30:15,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:15,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850508747] [2020-09-17 02:30:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:16,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850508747] [2020-09-17 02:30:16,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071311190] [2020-09-17 02:30:16,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:16,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:30:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:16,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:16,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:16,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:16,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:16,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193721084] [2020-09-17 02:30:16,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:16,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:16,176 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-17 02:30:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:16,669 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-17 02:30:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:30:16,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:16,671 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:30:16,671 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:30:16,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:30:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:30:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-17 02:30:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:30:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-17 02:30:16,673 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-17 02:30:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:16,674 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-17 02:30:16,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-17 02:30:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:16,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:16,675 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:16,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:30:16,883 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:16,884 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-17 02:30:16,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:16,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913317182] [2020-09-17 02:30:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:17,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913317182] [2020-09-17 02:30:17,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140236556] [2020-09-17 02:30:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:17,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:17,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:17,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023691802] [2020-09-17 02:30:17,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:17,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:17,231 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-17 02:30:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:17,784 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:30:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:30:17,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:17,786 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:30:17,786 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:30:17,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:30:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:30:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-17 02:30:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:30:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-17 02:30:17,789 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-17 02:30:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:17,789 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-17 02:30:17,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-17 02:30:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:17,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:17,790 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:17,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:17,996 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-17 02:30:17,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:17,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150090545] [2020-09-17 02:30:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:18,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150090545] [2020-09-17 02:30:18,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084218547] [2020-09-17 02:30:18,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:18,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:18,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:18,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:18,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:18,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333697678] [2020-09-17 02:30:18,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:18,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:18,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:18,368 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-17 02:30:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:18,933 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-17 02:30:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:30:18,934 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:18,935 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:30:18,935 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:30:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:30:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:30:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-17 02:30:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:30:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-17 02:30:18,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-17 02:30:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:18,938 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-17 02:30:18,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-17 02:30:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:18,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:18,939 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:19,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:19,149 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-17 02:30:19,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:19,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731474318] [2020-09-17 02:30:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:19,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731474318] [2020-09-17 02:30:19,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435697854] [2020-09-17 02:30:19,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:19,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:30:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:19,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:19,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:19,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:19,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948093396] [2020-09-17 02:30:19,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:19,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:19,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:19,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:19,504 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-17 02:30:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:20,073 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-17 02:30:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:30:20,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:20,075 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:30:20,075 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:30:20,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:30:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:30:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-17 02:30:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:30:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-17 02:30:20,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-17 02:30:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:20,079 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-17 02:30:20,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-17 02:30:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:20,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:20,080 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:20,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-17 02:30:20,285 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-17 02:30:20,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:20,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76191852] [2020-09-17 02:30:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:20,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76191852] [2020-09-17 02:30:20,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115748813] [2020-09-17 02:30:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:20,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:20,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:20,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:20,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:20,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072057463] [2020-09-17 02:30:20,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:20,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:20,646 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-17 02:30:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:21,329 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-17 02:30:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:30:21,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:21,332 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:30:21,332 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:30:21,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:30:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:30:21,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:30:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:30:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-17 02:30:21,336 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-17 02:30:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:21,336 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-17 02:30:21,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-17 02:30:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:21,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:21,337 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:21,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:30:21,547 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-17 02:30:21,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:21,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250616478] [2020-09-17 02:30:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:21,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250616478] [2020-09-17 02:30:21,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536397479] [2020-09-17 02:30:21,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:21,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:30:21,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:21,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:21,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:21,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956925404] [2020-09-17 02:30:21,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:21,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:21,866 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-17 02:30:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:22,502 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-17 02:30:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:30:22,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:22,504 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:30:22,504 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:30:22,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:30:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:30:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:30:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:30:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-17 02:30:22,507 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-17 02:30:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:22,507 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-17 02:30:22,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-17 02:30:22,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:22,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:22,508 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:22,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:22,711 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-17 02:30:22,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:22,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316612188] [2020-09-17 02:30:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:22,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316612188] [2020-09-17 02:30:22,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098292636] [2020-09-17 02:30:22,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:23,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:30:23,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:23,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:23,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:23,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:23,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037274613] [2020-09-17 02:30:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:23,059 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-17 02:30:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:23,885 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-17 02:30:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:30:23,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:23,887 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:30:23,887 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:30:23,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:30:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:30:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-17 02:30:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:30:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-17 02:30:23,891 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-17 02:30:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:23,891 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-17 02:30:23,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-17 02:30:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:23,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:23,892 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:24,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:30:24,097 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-17 02:30:24,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:24,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855222969] [2020-09-17 02:30:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:24,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855222969] [2020-09-17 02:30:24,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023337019] [2020-09-17 02:30:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:24,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:24,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:24,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123031596] [2020-09-17 02:30:24,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:24,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:24,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:24,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:24,442 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-17 02:30:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:25,162 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-17 02:30:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:30:25,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:25,164 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:30:25,164 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:30:25,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:30:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:30:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-17 02:30:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:30:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:30:25,168 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-17 02:30:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:25,168 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:30:25,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:30:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:25,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:25,169 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:25,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:25,374 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:25,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:25,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-17 02:30:25,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:25,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845564251] [2020-09-17 02:30:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:25,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845564251] [2020-09-17 02:30:25,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969592710] [2020-09-17 02:30:25,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:25,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:25,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:25,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:25,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:25,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:25,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616818946] [2020-09-17 02:30:25,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:25,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:25,709 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-17 02:30:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:26,625 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-17 02:30:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:30:26,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:26,627 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:30:26,627 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:30:26,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:30:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:30:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-17 02:30:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:30:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:30:26,629 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-17 02:30:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:26,629 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:30:26,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:30:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:26,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:26,630 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:26,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:30:26,831 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-17 02:30:26,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:26,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888149827] [2020-09-17 02:30:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:27,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888149827] [2020-09-17 02:30:27,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158351723] [2020-09-17 02:30:27,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:27,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:30:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:27,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:27,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:27,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452039708] [2020-09-17 02:30:27,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:27,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:27,132 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-17 02:30:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:27,915 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-17 02:30:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:30:27,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:27,917 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:30:27,917 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:30:27,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:30:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:30:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-17 02:30:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:30:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-17 02:30:27,919 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-17 02:30:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:27,919 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-17 02:30:27,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-17 02:30:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:27,920 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:28,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:28,121 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-17 02:30:28,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:28,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288725341] [2020-09-17 02:30:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:28,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288725341] [2020-09-17 02:30:28,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324207550] [2020-09-17 02:30:28,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:28,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:28,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:28,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:28,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:28,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:28,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:28,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:28,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425523293] [2020-09-17 02:30:28,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:28,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:28,462 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-17 02:30:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:29,448 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-17 02:30:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:30:29,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:29,450 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:30:29,450 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:30:29,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:30:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:30:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-17 02:30:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:30:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:30:29,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-17 02:30:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:29,452 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:30:29,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:30:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:29,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:29,453 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:29,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:30:29,660 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-17 02:30:29,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:29,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002066960] [2020-09-17 02:30:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002066960] [2020-09-17 02:30:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313838532] [2020-09-17 02:30:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:29,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:30:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:29,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:29,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:30:29,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094425432] [2020-09-17 02:30:29,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:30:29,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:30:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:30:29,983 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-17 02:30:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:30,959 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:30:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:30,960 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:30:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:30,961 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:30:30,961 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:30:30,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:30:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:30:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-17 02:30:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:30:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-17 02:30:30,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-17 02:30:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:30,964 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-17 02:30:30,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:30:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-17 02:30:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:30:30,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:30,965 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:31,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-17 02:30:31,174 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-17 02:30:31,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:31,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073904580] [2020-09-17 02:30:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:31,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073904580] [2020-09-17 02:30:31,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873628575] [2020-09-17 02:30:31,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:31,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:30:31,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:30:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:31,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:31,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:31,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:30:31,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810143667] [2020-09-17 02:30:31,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:31,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:31,577 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-17 02:30:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:32,682 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-17 02:30:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:30:32,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:30:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:32,684 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:30:32,684 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:30:32,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:30:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:30:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-17 02:30:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:30:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-17 02:30:32,687 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-17 02:30:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:32,687 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-17 02:30:32,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-17 02:30:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:32,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:32,687 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:32,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:32,888 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-17 02:30:32,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:32,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426542851] [2020-09-17 02:30:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:33,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426542851] [2020-09-17 02:30:33,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462868603] [2020-09-17 02:30:33,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:33,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:33,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:33,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234670546] [2020-09-17 02:30:33,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:33,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:33,277 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-17 02:30:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:33,784 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-17 02:30:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:30:33,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:33,785 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:30:33,786 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:30:33,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:30:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:30:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-17 02:30:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:33,788 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:33,788 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:33,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:33,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:33,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:33,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:33,995 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-17 02:30:33,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:33,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655694986] [2020-09-17 02:30:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:34,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655694986] [2020-09-17 02:30:34,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989258949] [2020-09-17 02:30:34,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:34,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:34,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:34,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:34,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119125363] [2020-09-17 02:30:34,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:34,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:34,404 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:35,036 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-17 02:30:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:30:35,037 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:35,038 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:30:35,038 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:30:35,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:30:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:30:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 02:30:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:35,042 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:35,042 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:35,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:35,043 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:35,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:30:35,252 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-17 02:30:35,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:35,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617739523] [2020-09-17 02:30:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:35,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617739523] [2020-09-17 02:30:35,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107696517] [2020-09-17 02:30:35,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:35,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:30:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:35,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:35,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:35,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554485449] [2020-09-17 02:30:35,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:35,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:35,615 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:36,185 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:30:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:30:36,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:36,187 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:30:36,187 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:30:36,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:30:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:30:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-17 02:30:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:36,189 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:36,190 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:36,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:36,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:36,190 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:36,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:36,399 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-17 02:30:36,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:36,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023834302] [2020-09-17 02:30:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:36,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023834302] [2020-09-17 02:30:36,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095901992] [2020-09-17 02:30:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:36,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:36,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:36,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:36,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:36,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:36,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848239112] [2020-09-17 02:30:36,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:36,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:36,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:36,809 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:37,556 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-17 02:30:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:30:37,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:37,558 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:30:37,558 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:30:37,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:30:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:30:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-17 02:30:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:37,561 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:37,561 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:37,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:37,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:37,562 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:37,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:30:37,763 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:37,764 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-17 02:30:37,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:37,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216483802] [2020-09-17 02:30:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:38,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216483802] [2020-09-17 02:30:38,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892373308] [2020-09-17 02:30:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:38,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:30:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:38,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:38,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:38,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794924978] [2020-09-17 02:30:38,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:38,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:38,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:38,118 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:38,759 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:30:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:30:38,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:38,761 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:30:38,761 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:30:38,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:30:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:30:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-17 02:30:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:38,763 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:38,764 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:38,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:38,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:38,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:38,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:30:38,970 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-17 02:30:38,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:38,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507313532] [2020-09-17 02:30:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:39,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507313532] [2020-09-17 02:30:39,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520558336] [2020-09-17 02:30:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:39,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:30:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:39,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:39,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:39,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:39,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557466257] [2020-09-17 02:30:39,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:39,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:39,369 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:40,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:40,208 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:30:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:30:40,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:40,210 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:30:40,210 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:30:40,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:30:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:30:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-17 02:30:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:40,213 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:40,214 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:40,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:40,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:40,214 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:40,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:30:40,422 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-17 02:30:40,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:40,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37597951] [2020-09-17 02:30:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:40,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37597951] [2020-09-17 02:30:40,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953488135] [2020-09-17 02:30:40,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:40,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:40,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:40,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:40,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843516201] [2020-09-17 02:30:40,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:40,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:40,766 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:41,517 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-17 02:30:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:30:41,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:41,519 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:30:41,519 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:30:41,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:30:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:30:41,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-17 02:30:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:41,522 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:41,522 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:41,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:41,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:41,523 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:41,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:41,732 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-17 02:30:41,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:41,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295649373] [2020-09-17 02:30:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:41,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295649373] [2020-09-17 02:30:41,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159964598] [2020-09-17 02:30:41,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:42,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:42,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:42,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:42,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:42,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526532713] [2020-09-17 02:30:42,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:42,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:42,111 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:43,041 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-17 02:30:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:30:43,043 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:43,043 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:30:43,043 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:30:43,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:30:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:30:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-17 02:30:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:43,047 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:43,047 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:43,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:43,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:43,048 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:43,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:30:43,257 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-17 02:30:43,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:43,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677423141] [2020-09-17 02:30:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:43,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677423141] [2020-09-17 02:30:43,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287379152] [2020-09-17 02:30:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:43,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:30:43,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:43,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:43,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:43,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229012184] [2020-09-17 02:30:43,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:43,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:43,610 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:44,430 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-17 02:30:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:30:44,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:44,432 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:30:44,432 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:30:44,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:30:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:30:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-17 02:30:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:44,435 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:44,435 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:44,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:44,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:44,436 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:44,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:44,640 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-17 02:30:44,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:44,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670003104] [2020-09-17 02:30:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:44,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670003104] [2020-09-17 02:30:44,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436878719] [2020-09-17 02:30:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:44,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:44,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:45,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:45,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:45,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103375532] [2020-09-17 02:30:45,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:45,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:45,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:45,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:45,016 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:46,074 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:30:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:30:46,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:46,075 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:30:46,076 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:30:46,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:30:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:30:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-17 02:30:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:46,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:46,078 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:46,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:46,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:46,079 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:46,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:46,280 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:46,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-17 02:30:46,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:46,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147411552] [2020-09-17 02:30:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:46,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147411552] [2020-09-17 02:30:46,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081892605] [2020-09-17 02:30:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:46,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:30:46,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:46,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:46,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:46,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576257711] [2020-09-17 02:30:46,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:46,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:46,623 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:47,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:47,518 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:30:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:30:47,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:47,520 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:30:47,520 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:30:47,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:30:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:30:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-17 02:30:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:30:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:30:47,522 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:30:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:47,523 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:30:47,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:30:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:47,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:47,523 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:47,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:47,731 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-17 02:30:47,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:47,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307196680] [2020-09-17 02:30:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:47,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307196680] [2020-09-17 02:30:47,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193213364] [2020-09-17 02:30:47,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:48,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:30:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:48,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:48,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:48,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:48,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:48,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520816930] [2020-09-17 02:30:48,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:48,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:48,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:48,110 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:30:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:49,290 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-17 02:30:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:30:49,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:49,292 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:30:49,292 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:30:49,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:30:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:30:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-17 02:30:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:30:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:30:49,295 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:30:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:49,295 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:30:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:30:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:49,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:49,296 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:49,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:49,497 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-17 02:30:49,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:49,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191402436] [2020-09-17 02:30:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:49,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191402436] [2020-09-17 02:30:49,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704925245] [2020-09-17 02:30:49,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:49,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:49,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:49,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:30:49,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645310927] [2020-09-17 02:30:49,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:30:49,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:30:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:30:49,827 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:30:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:50,784 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:30:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:50,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:30:50,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:50,786 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:30:50,786 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:30:50,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:30:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:30:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-17 02:30:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:30:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-17 02:30:50,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-17 02:30:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:50,789 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-17 02:30:50,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:30:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-17 02:30:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:50,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:50,790 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:50,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-17 02:30:50,991 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-17 02:30:50,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:50,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234280268] [2020-09-17 02:30:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:51,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234280268] [2020-09-17 02:30:51,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407741358] [2020-09-17 02:30:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:51,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:30:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:51,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:51,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:51,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:51,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135078360] [2020-09-17 02:30:51,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:51,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:51,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:51,425 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-17 02:30:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:52,714 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-17 02:30:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:30:52,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:52,716 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:30:52,716 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:30:52,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:30:52,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:30:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 02:30:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:30:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-17 02:30:52,719 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-17 02:30:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:52,719 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-17 02:30:52,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-17 02:30:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:30:52,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:52,720 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:52,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:30:52,924 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-17 02:30:52,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:52,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549437398] [2020-09-17 02:30:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:53,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549437398] [2020-09-17 02:30:53,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036336208] [2020-09-17 02:30:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:53,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:30:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:30:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:53,286 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:53,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:53,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:30:53,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210957683] [2020-09-17 02:30:53,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:53,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:53,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:53,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:53,314 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-17 02:30:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:54,449 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-17 02:30:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:54,450 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:30:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:54,451 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:30:54,451 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:30:54,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:30:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:30:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-17 02:30:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:30:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:30:54,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-17 02:30:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:54,454 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:30:54,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:30:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:30:54,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:54,455 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:54,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:30:54,656 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:54,657 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-17 02:30:54,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:54,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456911725] [2020-09-17 02:30:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:54,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456911725] [2020-09-17 02:30:54,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356197437] [2020-09-17 02:30:54,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:55,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:30:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:30:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:55,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:30:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:55,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:55,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:30:55,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055025614] [2020-09-17 02:30:55,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:30:55,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:30:55,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:30:55,062 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-17 02:30:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:56,299 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-17 02:30:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:30:56,300 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:30:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:56,300 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:30:56,301 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:30:56,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:30:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:30:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-17 02:30:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:30:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 02:30:56,303 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-17 02:30:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:56,303 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 02:30:56,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:30:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 02:30:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:30:56,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:56,304 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:56,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:30:56,505 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-17 02:30:56,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:56,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378128675] [2020-09-17 02:30:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:56,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378128675] [2020-09-17 02:30:56,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796921965] [2020-09-17 02:30:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:56,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:30:56,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:30:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:56,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:56,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:30:56,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795341271] [2020-09-17 02:30:56,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:56,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:56,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:56,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:56,941 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-17 02:30:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:57,454 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-17 02:30:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:30:57,455 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:30:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:57,455 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:30:57,455 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:30:57,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:30:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:30:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 02:30:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:30:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 02:30:57,457 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-17 02:30:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:57,458 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 02:30:57,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:30:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 02:30:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:30:57,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:57,459 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:57,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:30:57,666 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:57,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-17 02:30:57,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:57,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077130560] [2020-09-17 02:30:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:58,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077130560] [2020-09-17 02:30:58,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90462537] [2020-09-17 02:30:58,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:58,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:30:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:30:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:30:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:58,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:30:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:58,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:58,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:30:58,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106619247] [2020-09-17 02:30:58,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:30:58,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:30:58,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:30:58,259 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-17 02:30:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:30:58,847 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-17 02:30:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:30:58,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:30:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:30:58,849 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:30:58,849 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:30:58,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:30:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:30:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:30:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:30:58,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-17 02:30:58,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-17 02:30:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:30:58,853 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-17 02:30:58,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:30:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-17 02:30:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:30:58,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:30:58,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:30:59,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:30:59,058 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:30:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:30:59,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-17 02:30:59,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:30:59,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009360314] [2020-09-17 02:30:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:30:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:59,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009360314] [2020-09-17 02:30:59,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695767798] [2020-09-17 02:30:59,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:30:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:30:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:30:59,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:30:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:30:59,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:30:59,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:30:59,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905919365] [2020-09-17 02:30:59,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:30:59,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:30:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:30:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:30:59,482 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-17 02:31:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:00,177 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-17 02:31:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:31:00,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:00,179 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:31:00,179 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:31:00,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:31:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:31:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:31:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:31:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-17 02:31:00,182 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-17 02:31:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:00,182 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-17 02:31:00,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-17 02:31:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:00,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:00,183 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:00,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-17 02:31:00,384 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-17 02:31:00,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:00,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391113635] [2020-09-17 02:31:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:00,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391113635] [2020-09-17 02:31:00,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271611346] [2020-09-17 02:31:00,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:00,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:00,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:00,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:00,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:00,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:00,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148306287] [2020-09-17 02:31:00,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:00,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:00,836 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-17 02:31:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:01,537 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-17 02:31:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:31:01,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:01,539 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:31:01,539 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:31:01,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:31:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:31:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-17 02:31:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:31:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-17 02:31:01,542 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-17 02:31:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:01,542 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-17 02:31:01,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-17 02:31:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:01,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:01,543 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:01,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:31:01,744 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-17 02:31:01,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:01,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353724224] [2020-09-17 02:31:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:02,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353724224] [2020-09-17 02:31:02,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581015483] [2020-09-17 02:31:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:02,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:31:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:02,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:02,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:02,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:02,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705438830] [2020-09-17 02:31:02,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:02,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:02,164 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-17 02:31:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:02,886 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-17 02:31:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:31:02,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:02,887 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:31:02,888 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:31:02,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:31:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:31:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-17 02:31:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:31:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-17 02:31:02,891 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-17 02:31:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:02,891 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-17 02:31:02,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-17 02:31:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:02,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:02,892 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:03,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:03,099 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:03,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-17 02:31:03,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:03,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817654510] [2020-09-17 02:31:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:03,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817654510] [2020-09-17 02:31:03,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894545246] [2020-09-17 02:31:03,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:03,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:03,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:03,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:03,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:03,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353400455] [2020-09-17 02:31:03,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:03,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:03,563 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-17 02:31:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:04,425 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-17 02:31:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:31:04,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:04,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:04,427 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:31:04,427 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:31:04,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:31:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:31:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-17 02:31:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:31:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-17 02:31:04,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-17 02:31:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:04,430 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-17 02:31:04,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-17 02:31:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:04,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:04,431 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:04,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:04,634 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-17 02:31:04,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:04,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615009562] [2020-09-17 02:31:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:04,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615009562] [2020-09-17 02:31:04,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031428443] [2020-09-17 02:31:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:05,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:31:05,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:05,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:05,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:05,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123690958] [2020-09-17 02:31:05,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:05,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:05,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:05,086 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-17 02:31:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:05,879 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-17 02:31:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:31:05,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:05,880 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:31:05,880 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:31:05,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:31:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:31:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-17 02:31:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:31:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-17 02:31:05,884 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-17 02:31:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:05,884 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-17 02:31:05,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-17 02:31:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:05,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:05,885 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:06,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:06,093 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-17 02:31:06,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:06,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858499458] [2020-09-17 02:31:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:06,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858499458] [2020-09-17 02:31:06,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814985072] [2020-09-17 02:31:06,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:06,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:31:06,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:06,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:06,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:06,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:06,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035520423] [2020-09-17 02:31:06,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:06,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:06,535 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-17 02:31:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:07,510 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-17 02:31:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:31:07,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:07,512 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:31:07,512 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:31:07,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:31:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:31:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-17 02:31:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:31:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-17 02:31:07,515 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-17 02:31:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:07,515 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-17 02:31:07,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-17 02:31:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:07,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:07,516 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:07,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:31:07,726 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:07,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-17 02:31:07,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:07,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121049761] [2020-09-17 02:31:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:07,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121049761] [2020-09-17 02:31:07,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433994157] [2020-09-17 02:31:07,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:08,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:08,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:08,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451931127] [2020-09-17 02:31:08,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:08,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:08,077 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-17 02:31:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:08,993 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-17 02:31:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:31:08,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:08,995 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:31:08,995 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:31:08,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:31:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:31:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-17 02:31:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:31:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-17 02:31:08,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-17 02:31:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:08,999 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-17 02:31:08,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-17 02:31:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:08,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:09,000 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:09,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:09,207 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-17 02:31:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:09,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595003561] [2020-09-17 02:31:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:09,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595003561] [2020-09-17 02:31:09,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997574184] [2020-09-17 02:31:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:09,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:09,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:09,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:09,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:09,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324629680] [2020-09-17 02:31:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:09,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:09,642 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-17 02:31:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:10,750 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-17 02:31:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:31:10,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:10,752 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:31:10,752 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:31:10,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:31:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:31:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-17 02:31:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:31:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-17 02:31:10,759 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-17 02:31:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:10,759 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-17 02:31:10,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-17 02:31:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:10,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:10,760 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:10,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:31:10,969 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-17 02:31:10,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:10,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332688615] [2020-09-17 02:31:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:11,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332688615] [2020-09-17 02:31:11,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937983804] [2020-09-17 02:31:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:11,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:31:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:11,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:11,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:11,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:11,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562843283] [2020-09-17 02:31:11,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:11,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:11,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:11,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:11,367 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-17 02:31:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:12,393 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-17 02:31:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:31:12,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:12,395 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:31:12,396 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:31:12,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:31:12,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:31:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-17 02:31:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:31:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:31:12,398 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-17 02:31:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:12,398 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:31:12,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:31:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:12,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:12,399 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:12,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 02:31:12,600 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-17 02:31:12,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:12,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089234168] [2020-09-17 02:31:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:12,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089234168] [2020-09-17 02:31:12,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927020854] [2020-09-17 02:31:12,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:12,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:12,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:12,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:12,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:12,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:12,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454756763] [2020-09-17 02:31:12,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:12,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:12,994 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-17 02:31:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:14,256 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-17 02:31:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:31:14,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:14,258 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:31:14,258 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:31:14,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:31:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:31:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-17 02:31:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:31:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:31:14,261 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-17 02:31:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:14,261 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:31:14,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:31:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:14,262 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:14,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 02:31:14,463 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:14,463 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-17 02:31:14,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:14,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557417432] [2020-09-17 02:31:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:14,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557417432] [2020-09-17 02:31:14,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552474430] [2020-09-17 02:31:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:14,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:31:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:14,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:14,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:14,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308182982] [2020-09-17 02:31:14,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:14,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:14,872 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-17 02:31:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:16,057 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-17 02:31:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:31:16,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:16,059 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:31:16,059 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:31:16,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:31:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:31:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-17 02:31:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:31:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-17 02:31:16,062 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-17 02:31:16,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:16,062 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-17 02:31:16,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:16,062 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-17 02:31:16,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:16,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:16,063 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:16,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:16,264 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-17 02:31:16,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:16,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211570064] [2020-09-17 02:31:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:16,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211570064] [2020-09-17 02:31:16,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877314309] [2020-09-17 02:31:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:16,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:31:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:16,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:16,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:16,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:16,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139357707] [2020-09-17 02:31:16,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:16,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:16,699 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-17 02:31:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:18,070 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-17 02:31:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:31:18,071 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:18,072 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:31:18,072 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:31:18,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:31:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:31:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-17 02:31:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:31:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:31:18,075 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-17 02:31:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:18,075 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:31:18,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:31:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:18,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:18,075 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:18,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:31:18,276 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-17 02:31:18,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:18,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834432486] [2020-09-17 02:31:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:18,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834432486] [2020-09-17 02:31:18,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122955999] [2020-09-17 02:31:18,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:18,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:31:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:18,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:18,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:31:18,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973504609] [2020-09-17 02:31:18,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:31:18,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:31:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:31:18,671 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-17 02:31:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:19,779 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-17 02:31:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:31:19,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:31:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:19,781 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:31:19,781 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:31:19,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:31:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:31:19,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-17 02:31:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:31:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-17 02:31:19,784 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-17 02:31:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:19,784 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-17 02:31:19,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:31:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-17 02:31:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:31:19,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:19,784 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:19,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:19,985 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-17 02:31:19,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:19,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227159392] [2020-09-17 02:31:19,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:20,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227159392] [2020-09-17 02:31:20,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398091585] [2020-09-17 02:31:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:20,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:20,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:20,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:20,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:31:20,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58694751] [2020-09-17 02:31:20,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:20,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:20,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:20,399 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-17 02:31:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:21,731 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-17 02:31:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:31:21,732 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:31:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:21,732 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:31:21,733 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:31:21,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:31:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:31:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-17 02:31:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:31:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-17 02:31:21,734 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-17 02:31:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:21,735 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-17 02:31:21,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-17 02:31:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:21,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:21,735 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:21,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:21,936 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-17 02:31:21,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:21,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361112327] [2020-09-17 02:31:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:22,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361112327] [2020-09-17 02:31:22,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10847516] [2020-09-17 02:31:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:22,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:31:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:22,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:22,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:22,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120619423] [2020-09-17 02:31:22,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:22,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:22,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:22,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:22,376 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-17 02:31:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:23,037 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-17 02:31:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:31:23,038 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:23,039 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:31:23,039 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:31:23,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:31:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:31:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-17 02:31:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:23,042 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:23,043 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:23,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:23,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:23,044 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:23,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:23,251 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-17 02:31:23,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:23,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207469434] [2020-09-17 02:31:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:23,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207469434] [2020-09-17 02:31:23,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265610015] [2020-09-17 02:31:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:23,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:23,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:23,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:23,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:23,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437426205] [2020-09-17 02:31:23,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:23,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:23,768 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:24,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:24,536 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:31:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:31:24,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:24,538 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:31:24,538 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:31:24,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:31:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:31:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-17 02:31:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:24,541 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:24,542 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:24,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:24,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:24,542 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:24,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:24,746 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-17 02:31:24,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:24,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337722400] [2020-09-17 02:31:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:25,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337722400] [2020-09-17 02:31:25,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281806528] [2020-09-17 02:31:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:25,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:31:25,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:25,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:25,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:25,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:25,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482445138] [2020-09-17 02:31:25,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:25,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:25,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:25,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:25,194 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:25,883 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:31:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:31:25,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:25,885 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:31:25,885 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:31:25,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:31:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:31:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-17 02:31:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:25,888 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:25,888 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:25,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:25,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:25,889 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:26,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:26,090 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-17 02:31:26,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:26,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256892089] [2020-09-17 02:31:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:26,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256892089] [2020-09-17 02:31:26,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530727271] [2020-09-17 02:31:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:26,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:31:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:26,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:26,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:26,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:26,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:26,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442469212] [2020-09-17 02:31:26,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:26,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:26,604 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:27,568 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-17 02:31:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:31:27,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:27,570 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:31:27,570 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:31:27,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:31:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:31:27,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-17 02:31:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:27,573 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:27,574 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:27,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:27,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:27,574 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:27,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:31:27,775 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-17 02:31:27,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:27,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233514760] [2020-09-17 02:31:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:28,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233514760] [2020-09-17 02:31:28,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537327831] [2020-09-17 02:31:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:28,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:28,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:28,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153469370] [2020-09-17 02:31:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:28,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:28,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:28,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:28,212 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:29,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:29,026 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-17 02:31:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:31:29,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:29,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:29,028 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:31:29,028 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:31:29,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:31:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:31:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-17 02:31:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:29,031 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:29,031 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:29,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:29,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:29,031 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:29,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:31:29,235 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-17 02:31:29,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:29,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604027930] [2020-09-17 02:31:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:29,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604027930] [2020-09-17 02:31:29,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068900157] [2020-09-17 02:31:29,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:29,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:29,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:29,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:29,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:29,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713124883] [2020-09-17 02:31:29,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:29,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:29,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:29,727 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:30,749 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 02:31:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:31:30,750 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:30,751 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:31:30,751 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:31:30,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:31:30,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:31:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-17 02:31:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:30,753 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:30,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:30,753 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:30,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:30,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:30,754 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:30,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:31:30,962 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-17 02:31:30,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:30,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700478729] [2020-09-17 02:31:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:31,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700478729] [2020-09-17 02:31:31,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87468942] [2020-09-17 02:31:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:31,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:31:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:31,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:31,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:31,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750472538] [2020-09-17 02:31:31,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:31,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:31,397 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:32,335 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-17 02:31:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:31:32,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:32,337 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:31:32,337 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:31:32,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:31:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:31:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-17 02:31:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:32,339 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:32,340 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:32,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:32,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:32,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:32,340 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:32,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:31:32,541 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:32,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-17 02:31:32,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:32,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926847429] [2020-09-17 02:31:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:32,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926847429] [2020-09-17 02:31:32,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243020293] [2020-09-17 02:31:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:32,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:32,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:32,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:33,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:33,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:33,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000058920] [2020-09-17 02:31:33,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:33,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:33,009 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:34,199 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-17 02:31:34,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:31:34,200 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:34,201 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:31:34,201 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:31:34,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:31:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:31:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-17 02:31:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:34,203 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:34,204 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:34,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:34,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:34,204 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:34,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:34,405 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-17 02:31:34,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:34,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480273994] [2020-09-17 02:31:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:34,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480273994] [2020-09-17 02:31:34,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114221445] [2020-09-17 02:31:34,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:34,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:31:34,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:34,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:34,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:34,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:34,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:34,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11391328] [2020-09-17 02:31:34,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:34,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:34,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:34,863 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:35,878 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-17 02:31:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:31:35,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:35,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:35,879 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:31:35,880 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:31:35,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:31:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:31:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-17 02:31:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:35,882 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:35,882 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:35,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:35,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:35,883 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:36,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:31:36,084 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-17 02:31:36,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:36,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19613201] [2020-09-17 02:31:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19613201] [2020-09-17 02:31:36,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644401816] [2020-09-17 02:31:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:36,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:31:36,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:36,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:36,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:36,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:36,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311683403] [2020-09-17 02:31:36,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:36,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:36,564 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:37,882 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-17 02:31:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:31:37,883 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:37,884 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:31:37,884 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:31:37,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:31:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:31:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-17 02:31:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:37,886 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:37,887 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:37,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:37,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:37,887 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:38,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:38,088 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:38,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-17 02:31:38,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:38,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801810346] [2020-09-17 02:31:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:38,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801810346] [2020-09-17 02:31:38,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37312284] [2020-09-17 02:31:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:38,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:38,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:38,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113824183] [2020-09-17 02:31:38,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:38,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:38,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:38,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:38,500 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:39,561 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-17 02:31:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:31:39,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:39,562 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:31:39,563 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:31:39,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:31:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:31:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-17 02:31:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:39,565 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:39,566 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:39,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:39,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:39,566 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:39,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:39,767 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-17 02:31:39,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:39,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854891424] [2020-09-17 02:31:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854891424] [2020-09-17 02:31:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260862307] [2020-09-17 02:31:40,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:40,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:40,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:40,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:40,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797982202] [2020-09-17 02:31:40,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:40,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:40,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:40,202 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:41,625 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:31:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:31:41,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:41,627 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:31:41,627 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:31:41,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:31:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:31:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-17 02:31:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:41,630 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:41,630 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:41,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:41,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:41,631 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:41,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-17 02:31:41,833 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-17 02:31:41,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:41,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466384097] [2020-09-17 02:31:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:42,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466384097] [2020-09-17 02:31:42,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672144791] [2020-09-17 02:31:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:42,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:31:42,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:42,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:42,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:42,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401997073] [2020-09-17 02:31:42,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:42,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:42,242 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:43,389 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 02:31:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:31:43,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:43,390 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:31:43,391 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:31:43,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:31:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:31:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-17 02:31:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:31:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:31:43,394 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:31:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:43,394 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:31:43,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:31:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:43,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:43,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:43,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:43,595 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-17 02:31:43,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:43,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291091503] [2020-09-17 02:31:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:43,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291091503] [2020-09-17 02:31:43,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695894844] [2020-09-17 02:31:43,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:43,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:44,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:44,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:44,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:44,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729469881] [2020-09-17 02:31:44,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:44,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:44,060 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:31:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:45,597 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-17 02:31:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:31:45,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:45,599 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:31:45,599 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:31:45,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:31:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:31:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-17 02:31:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:31:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:31:45,602 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:31:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:45,602 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:31:45,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:31:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:45,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:45,602 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:45,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:31:45,803 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-17 02:31:45,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:45,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885221472] [2020-09-17 02:31:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:46,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885221472] [2020-09-17 02:31:46,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590191717] [2020-09-17 02:31:46,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:46,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:31:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:46,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:46,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:31:46,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928401356] [2020-09-17 02:31:46,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:31:46,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:31:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:31:46,255 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:31:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:47,510 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:31:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:31:47,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:31:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:47,513 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:31:47,513 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:31:47,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:31:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:31:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-17 02:31:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:31:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-17 02:31:47,516 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-17 02:31:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:47,516 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-17 02:31:47,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:31:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-17 02:31:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:47,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:47,517 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:47,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:31:47,718 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:47,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-17 02:31:47,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:47,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013775442] [2020-09-17 02:31:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:48,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013775442] [2020-09-17 02:31:48,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874102274] [2020-09-17 02:31:48,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:48,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:31:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:48,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:48,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:48,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:48,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841447852] [2020-09-17 02:31:48,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:48,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:48,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:48,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:48,183 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-17 02:31:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:49,810 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-17 02:31:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:31:49,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:49,813 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:31:49,813 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:31:49,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:31:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:31:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-17 02:31:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:31:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-17 02:31:49,815 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-17 02:31:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:49,816 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-17 02:31:49,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-17 02:31:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:31:49,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:49,816 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:50,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:31:50,017 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-17 02:31:50,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:50,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690654590] [2020-09-17 02:31:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:50,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690654590] [2020-09-17 02:31:50,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853323327] [2020-09-17 02:31:50,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:31:50,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:50,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:31:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:50,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:50,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:31:50,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352309304] [2020-09-17 02:31:50,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:50,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:50,458 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-17 02:31:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:51,991 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:31:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:31:51,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:31:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:51,993 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:31:51,993 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:31:51,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:31:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:31:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-17 02:31:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:31:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:31:51,995 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-17 02:31:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:51,995 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:31:51,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:31:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:31:51,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:51,996 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:52,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:31:52,197 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:52,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-17 02:31:52,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:52,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004273425] [2020-09-17 02:31:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:52,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004273425] [2020-09-17 02:31:52,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779326645] [2020-09-17 02:31:52,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:52,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:31:52,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:52,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:31:52,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:52,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:31:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:52,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:52,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:31:52,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361210224] [2020-09-17 02:31:52,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:31:52,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:31:52,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:31:52,692 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-17 02:31:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:54,333 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-17 02:31:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:31:54,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:31:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:54,336 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:31:54,336 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:31:54,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:31:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:31:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:31:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:31:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 02:31:54,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-17 02:31:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:54,338 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 02:31:54,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:31:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 02:31:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:31:54,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:54,339 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:54,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:54,540 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-17 02:31:54,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:54,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380582707] [2020-09-17 02:31:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:54,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380582707] [2020-09-17 02:31:54,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85300746] [2020-09-17 02:31:54,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:55,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:31:55,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:31:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:55,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:55,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:31:55,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586849791] [2020-09-17 02:31:55,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:55,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:55,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:55,087 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-17 02:31:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:55,807 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-17 02:31:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:31:55,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:31:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:55,809 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:31:55,809 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:31:55,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:31:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:31:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 02:31:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:31:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 02:31:55,811 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-17 02:31:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:55,812 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 02:31:55,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 02:31:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:31:55,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:55,812 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:56,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:56,013 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-17 02:31:56,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:56,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916468400] [2020-09-17 02:31:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916468400] [2020-09-17 02:31:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295472464] [2020-09-17 02:31:56,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:56,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:31:56,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:56,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:31:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:56,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:56,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:56,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:31:56,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751602425] [2020-09-17 02:31:56,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:31:56,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:56,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:31:56,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:31:56,609 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-17 02:31:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:57,464 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-17 02:31:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:31:57,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:31:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:57,466 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:31:57,467 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:31:57,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:31:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:31:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-17 02:31:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:31:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-17 02:31:57,469 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-17 02:31:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:57,469 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-17 02:31:57,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:31:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-17 02:31:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:31:57,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:57,470 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:57,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:57,671 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:57,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-17 02:31:57,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:57,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001333248] [2020-09-17 02:31:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:58,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001333248] [2020-09-17 02:31:58,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202754058] [2020-09-17 02:31:58,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:58,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:31:58,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:58,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:31:58,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:58,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:58,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:31:58,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513616061] [2020-09-17 02:31:58,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:31:58,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:31:58,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:31:58,251 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-17 02:31:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:31:59,177 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-17 02:31:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:31:59,179 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:31:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:31:59,179 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:31:59,179 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:31:59,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:31:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:31:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-17 02:31:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:31:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-17 02:31:59,182 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-17 02:31:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:31:59,183 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-17 02:31:59,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:31:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-17 02:31:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:31:59,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:31:59,183 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:31:59,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:31:59,384 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:31:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:31:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-17 02:31:59,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:31:59,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061707412] [2020-09-17 02:31:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:31:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:31:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:59,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061707412] [2020-09-17 02:31:59,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510658769] [2020-09-17 02:31:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:31:59,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:31:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:31:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:31:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:31:59,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:31:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:31:59,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:31:59,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:31:59,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486905819] [2020-09-17 02:31:59,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:31:59,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:31:59,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:31:59,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:31:59,993 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-17 02:32:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:00,869 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-17 02:32:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:32:00,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:00,871 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:32:00,872 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:32:00,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:32:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:32:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-17 02:32:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:32:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-17 02:32:00,875 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-17 02:32:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:00,875 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-17 02:32:00,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-17 02:32:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:00,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:00,876 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:01,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:01,085 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-17 02:32:01,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:01,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625686044] [2020-09-17 02:32:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:01,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625686044] [2020-09-17 02:32:01,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936789456] [2020-09-17 02:32:01,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:01,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:01,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:01,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:01,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875245042] [2020-09-17 02:32:01,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:01,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:01,609 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-17 02:32:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:02,582 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-17 02:32:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:32:02,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:02,584 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:32:02,584 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:32:02,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:32:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:32:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-17 02:32:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:32:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-17 02:32:02,587 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-17 02:32:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:02,588 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-17 02:32:02,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-17 02:32:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:02,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:02,588 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:02,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:02,789 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-17 02:32:02,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:02,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365445417] [2020-09-17 02:32:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:03,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365445417] [2020-09-17 02:32:03,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580310278] [2020-09-17 02:32:03,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:03,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:03,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:03,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:03,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:03,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:03,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78500526] [2020-09-17 02:32:03,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:03,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:03,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:03,344 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-17 02:32:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:04,429 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-17 02:32:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:32:04,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:04,437 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:32:04,437 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:32:04,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:32:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:32:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-17 02:32:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:32:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-17 02:32:04,441 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-17 02:32:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:04,442 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-17 02:32:04,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-17 02:32:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:04,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:04,442 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:04,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:04,643 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:04,644 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-17 02:32:04,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:04,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787530930] [2020-09-17 02:32:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:05,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787530930] [2020-09-17 02:32:05,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539709596] [2020-09-17 02:32:05,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:05,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:32:05,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:05,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:05,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:05,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604350109] [2020-09-17 02:32:05,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:05,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:05,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:05,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:05,163 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-17 02:32:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:06,170 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-17 02:32:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:32:06,171 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:06,172 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:32:06,172 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:32:06,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:32:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:32:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-17 02:32:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:32:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-17 02:32:06,175 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-17 02:32:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:06,175 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-17 02:32:06,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-17 02:32:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:06,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:06,176 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:06,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:32:06,377 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-17 02:32:06,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:06,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576424375] [2020-09-17 02:32:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:06,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576424375] [2020-09-17 02:32:06,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715688417] [2020-09-17 02:32:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:06,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:06,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:06,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:06,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:06,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135746997] [2020-09-17 02:32:06,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:06,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:06,933 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-17 02:32:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:08,267 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-17 02:32:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:32:08,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:08,269 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:32:08,269 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:32:08,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:32:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:32:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-17 02:32:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:32:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-17 02:32:08,272 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-17 02:32:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:08,273 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-17 02:32:08,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-17 02:32:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:08,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:08,273 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:08,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-17 02:32:08,482 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-17 02:32:08,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:08,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491067753] [2020-09-17 02:32:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:08,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491067753] [2020-09-17 02:32:08,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741472465] [2020-09-17 02:32:08,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:08,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:32:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:08,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:08,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:08,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573233026] [2020-09-17 02:32:08,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:08,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:08,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:08,987 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-17 02:32:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:10,056 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-17 02:32:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:32:10,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:10,064 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:32:10,064 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:32:10,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:32:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:32:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-17 02:32:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:32:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-17 02:32:10,066 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-17 02:32:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:10,066 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-17 02:32:10,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-17 02:32:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:10,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:10,066 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:10,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:32:10,267 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-17 02:32:10,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:10,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001292252] [2020-09-17 02:32:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:10,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001292252] [2020-09-17 02:32:10,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705112413] [2020-09-17 02:32:10,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:10,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:32:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:10,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:10,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:10,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:10,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:10,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277731200] [2020-09-17 02:32:10,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:10,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:10,785 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-17 02:32:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:12,243 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-17 02:32:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:32:12,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:12,245 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:32:12,245 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:32:12,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:32:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:32:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-17 02:32:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:32:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-17 02:32:12,248 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-17 02:32:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:12,249 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-17 02:32:12,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-17 02:32:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:12,249 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:12,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:32:12,451 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-17 02:32:12,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:12,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329445078] [2020-09-17 02:32:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:12,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329445078] [2020-09-17 02:32:12,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598917722] [2020-09-17 02:32:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:12,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:12,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:12,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:12,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526342060] [2020-09-17 02:32:12,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:12,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:12,923 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-17 02:32:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:14,135 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:32:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:32:14,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:14,138 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:32:14,138 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:32:14,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:32:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:32:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 02:32:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:32:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-17 02:32:14,141 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-17 02:32:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:14,141 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-17 02:32:14,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-17 02:32:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:14,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:14,142 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:14,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:14,343 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:14,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-17 02:32:14,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:14,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825976730] [2020-09-17 02:32:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:14,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825976730] [2020-09-17 02:32:14,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255739559] [2020-09-17 02:32:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:14,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:14,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:14,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:14,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:14,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395925791] [2020-09-17 02:32:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:14,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:14,883 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-17 02:32:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:16,480 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-17 02:32:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:32:16,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:16,482 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:32:16,482 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:32:16,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:32:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:32:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-17 02:32:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:32:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-17 02:32:16,485 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-17 02:32:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:16,486 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-17 02:32:16,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-17 02:32:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:16,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:16,486 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:16,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:16,687 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-17 02:32:16,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:16,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267176588] [2020-09-17 02:32:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:17,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267176588] [2020-09-17 02:32:17,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512471255] [2020-09-17 02:32:17,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:32:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:17,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:17,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:17,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:17,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957688169] [2020-09-17 02:32:17,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:17,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:17,187 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-17 02:32:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:18,469 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:32:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:32:18,470 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:18,470 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:32:18,471 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:32:18,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:32:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:32:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 02:32:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:32:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:32:18,472 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-17 02:32:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:18,473 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:32:18,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:32:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:18,473 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:18,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:32:18,674 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-17 02:32:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:18,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123239763] [2020-09-17 02:32:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:19,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123239763] [2020-09-17 02:32:19,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153688695] [2020-09-17 02:32:19,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:19,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:19,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:19,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:19,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:19,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790280265] [2020-09-17 02:32:19,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:19,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:19,177 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-17 02:32:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:20,688 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:32:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:32:20,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:20,690 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:32:20,690 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:32:20,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:32:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:32:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-17 02:32:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:32:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:32:20,693 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-17 02:32:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:20,693 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:32:20,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:32:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:20,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:20,694 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:20,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:20,895 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-17 02:32:20,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:20,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330952246] [2020-09-17 02:32:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:21,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330952246] [2020-09-17 02:32:21,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703550496] [2020-09-17 02:32:21,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:21,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:32:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:21,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:21,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:21,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:21,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:21,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231948816] [2020-09-17 02:32:21,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:21,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:21,413 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-17 02:32:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:22,946 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-17 02:32:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:32:22,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:22,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:22,948 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:32:22,949 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:32:22,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:32:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:32:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 02:32:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:32:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-17 02:32:22,952 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-17 02:32:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:22,952 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-17 02:32:22,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-17 02:32:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:22,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:22,953 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:23,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:23,154 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-17 02:32:23,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:23,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071938366] [2020-09-17 02:32:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:23,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071938366] [2020-09-17 02:32:23,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999914854] [2020-09-17 02:32:23,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:23,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:32:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:23,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:23,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:23,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:23,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727649074] [2020-09-17 02:32:23,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:23,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:23,697 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-17 02:32:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:25,624 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-17 02:32:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:32:25,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:25,626 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:32:25,627 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:32:25,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:32:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:32:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-17 02:32:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:32:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:32:25,629 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-17 02:32:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:25,630 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:32:25,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:32:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:25,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:25,630 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:25,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:25,831 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-17 02:32:25,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:25,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522704633] [2020-09-17 02:32:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:26,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522704633] [2020-09-17 02:32:26,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242423379] [2020-09-17 02:32:26,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:26,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:26,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:26,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:32:26,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720536185] [2020-09-17 02:32:26,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:32:26,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:32:26,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:32:26,352 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-17 02:32:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:27,987 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:32:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:32:27,989 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:32:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:27,989 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:32:27,990 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:32:27,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:32:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:32:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-17 02:32:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:32:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-17 02:32:27,993 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-17 02:32:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:27,993 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-17 02:32:27,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:32:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-17 02:32:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:32:27,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:27,994 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:28,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:28,203 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-17 02:32:28,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:28,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199690235] [2020-09-17 02:32:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:28,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199690235] [2020-09-17 02:32:28,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436281278] [2020-09-17 02:32:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:28,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:28,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:32:28,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:28,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:28,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:28,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:32:28,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46419200] [2020-09-17 02:32:28,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:28,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:28,760 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-17 02:32:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:30,783 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-17 02:32:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:32:30,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:32:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:30,785 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:32:30,786 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:32:30,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:32:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:32:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-17 02:32:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:32:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-17 02:32:30,788 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-17 02:32:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:30,789 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-17 02:32:30,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-17 02:32:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:30,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:30,789 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:30,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:30,990 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:30,991 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-17 02:32:30,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:30,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166850974] [2020-09-17 02:32:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:31,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166850974] [2020-09-17 02:32:31,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789065391] [2020-09-17 02:32:31,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:31,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:32:31,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:31,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:31,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:31,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977559127] [2020-09-17 02:32:31,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:31,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:31,604 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-17 02:32:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:32,414 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:32:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:32:32,415 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:32,416 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:32:32,416 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:32:32,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:32:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:32:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-17 02:32:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:32,418 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:32,419 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:32,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:32,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:32,419 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:32,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:32:32,620 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-17 02:32:32,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:32,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83576137] [2020-09-17 02:32:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:33,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83576137] [2020-09-17 02:32:33,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675924239] [2020-09-17 02:32:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:33,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:33,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:33,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:33,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:33,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:33,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:33,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:33,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593786254] [2020-09-17 02:32:33,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:33,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:33,274 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:34,264 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-17 02:32:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:32:34,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:34,266 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:32:34,266 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:32:34,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:32:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:32:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 02:32:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:34,269 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:34,270 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:34,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:34,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:34,270 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:34,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:32:34,471 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-17 02:32:34,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:34,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659203573] [2020-09-17 02:32:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:34,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659203573] [2020-09-17 02:32:34,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435629203] [2020-09-17 02:32:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:35,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:32:35,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:35,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:35,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:35,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:35,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581618359] [2020-09-17 02:32:35,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:35,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:35,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:35,031 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:36,038 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-17 02:32:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:32:36,039 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:36,040 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:32:36,040 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:32:36,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:32:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:32:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-17 02:32:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:36,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:36,042 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:36,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:36,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:36,043 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:36,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:36,244 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-17 02:32:36,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:36,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667319363] [2020-09-17 02:32:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:36,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667319363] [2020-09-17 02:32:36,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373607691] [2020-09-17 02:32:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:36,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:32:36,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:36,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:36,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:36,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:36,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325491072] [2020-09-17 02:32:36,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:36,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:36,956 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:38,151 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-17 02:32:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:32:38,153 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:38,154 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:32:38,154 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:32:38,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:32:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:32:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-17 02:32:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:38,156 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:38,157 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:38,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:38,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:38,157 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:38,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:32:38,358 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-17 02:32:38,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:38,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722265521] [2020-09-17 02:32:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:38,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722265521] [2020-09-17 02:32:38,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801309153] [2020-09-17 02:32:38,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:38,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:38,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:38,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:38,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567441070] [2020-09-17 02:32:38,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:38,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:38,974 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:40,136 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-17 02:32:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:32:40,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:40,138 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:32:40,139 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:32:40,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:32:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:32:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-17 02:32:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:40,142 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:40,142 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:40,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:40,142 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:40,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:40,142 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:40,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:40,343 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-17 02:32:40,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:40,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280426520] [2020-09-17 02:32:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:40,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280426520] [2020-09-17 02:32:40,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696792392] [2020-09-17 02:32:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:40,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:40,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:40,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:41,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:41,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:41,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624198121] [2020-09-17 02:32:41,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:41,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:41,008 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:42,456 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-17 02:32:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:32:42,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:42,458 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:32:42,458 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:32:42,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:32:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:32:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-17 02:32:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:42,462 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:42,462 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:42,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:42,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:42,462 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:42,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:42,663 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-17 02:32:42,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:42,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458704513] [2020-09-17 02:32:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:43,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458704513] [2020-09-17 02:32:43,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749078991] [2020-09-17 02:32:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:43,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:32:43,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:43,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:43,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:43,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341683774] [2020-09-17 02:32:43,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:43,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:43,281 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:44,570 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:32:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:32:44,572 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:44,572 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:32:44,572 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:32:44,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:32:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:32:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-17 02:32:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:44,575 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:44,575 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:44,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:44,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:44,576 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:44,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:44,777 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-17 02:32:44,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:44,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13775831] [2020-09-17 02:32:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:45,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13775831] [2020-09-17 02:32:45,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449059993] [2020-09-17 02:32:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:45,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:45,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:45,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:45,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:45,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52580346] [2020-09-17 02:32:45,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:45,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:45,448 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:46,895 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-17 02:32:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:32:46,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:46,897 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:32:46,897 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:32:46,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:32:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:32:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-17 02:32:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:46,901 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:46,901 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:46,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:46,902 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:47,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:47,111 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-17 02:32:47,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:47,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400646589] [2020-09-17 02:32:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:47,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400646589] [2020-09-17 02:32:47,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834541655] [2020-09-17 02:32:47,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:47,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:32:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:47,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:47,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:47,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671470351] [2020-09-17 02:32:47,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:47,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:47,720 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:49,139 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-17 02:32:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:32:49,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:49,142 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:32:49,142 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:32:49,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:32:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:32:49,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-17 02:32:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:49,145 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:49,145 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:49,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:49,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:49,146 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:49,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-17 02:32:49,347 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-17 02:32:49,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:49,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293990500] [2020-09-17 02:32:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293990500] [2020-09-17 02:32:49,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874828903] [2020-09-17 02:32:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:49,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:32:49,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:49,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:49,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:49,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:49,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151009226] [2020-09-17 02:32:49,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:49,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:49,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:49,955 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:51,591 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-17 02:32:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:32:51,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:51,594 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:32:51,594 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:32:51,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:32:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:32:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-17 02:32:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:51,597 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:51,598 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:51,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:51,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:51,599 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:51,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:51,809 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-17 02:32:51,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:51,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971201955] [2020-09-17 02:32:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:52,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971201955] [2020-09-17 02:32:52,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505242543] [2020-09-17 02:32:52,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:52,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:52,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:52,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:52,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194816347] [2020-09-17 02:32:52,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:52,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:52,342 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:53,755 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-17 02:32:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:32:53,756 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:53,757 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:32:53,757 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:32:53,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:32:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:32:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-17 02:32:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:53,761 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:53,761 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:53,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:53,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:53,762 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:53,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:32:53,963 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:53,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-17 02:32:53,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:53,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513405075] [2020-09-17 02:32:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:54,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513405075] [2020-09-17 02:32:54,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10392942] [2020-09-17 02:32:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:54,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:32:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:54,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:54,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:54,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:54,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:54,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636624884] [2020-09-17 02:32:54,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:54,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:54,540 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:32:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:56,351 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-17 02:32:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:32:56,353 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:32:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:56,354 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:32:56,354 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:32:56,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:32:56,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:32:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-17 02:32:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:32:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:32:56,357 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:32:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:56,357 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:32:56,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:32:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:32:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:56,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:56,357 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:56,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:32:56,558 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-17 02:32:56,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:56,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508453047] [2020-09-17 02:32:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:56,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508453047] [2020-09-17 02:32:56,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794940379] [2020-09-17 02:32:56,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:57,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:32:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:57,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:57,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:57,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:32:57,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989981412] [2020-09-17 02:32:57,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:32:57,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:57,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:32:57,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:32:57,072 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:32:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:32:58,622 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:32:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:32:58,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:32:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:32:58,625 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:32:58,625 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:32:58,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:32:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:32:58,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-17 02:32:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:32:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:32:58,628 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:32:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:32:58,628 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:32:58,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:32:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:32:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:32:58,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:32:58,629 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:32:58,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:32:58,836 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:32:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:32:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-17 02:32:58,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:32:58,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303006317] [2020-09-17 02:32:58,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:32:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:32:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:59,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303006317] [2020-09-17 02:32:59,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643062109] [2020-09-17 02:32:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:32:59,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:32:59,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:32:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:32:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:32:59,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:32:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:32:59,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:32:59,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:32:59,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418740263] [2020-09-17 02:32:59,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:32:59,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:32:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:32:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:32:59,379 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:33:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:01,329 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:33:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:33:01,330 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:33:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:01,330 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:33:01,331 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:33:01,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:33:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:33:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-17 02:33:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:33:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:33:01,334 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:33:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:01,334 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:33:01,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:33:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:33:01,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:01,335 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:01,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:01,541 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-17 02:33:01,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:01,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443832339] [2020-09-17 02:33:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:01,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443832339] [2020-09-17 02:33:01,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543415156] [2020-09-17 02:33:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:02,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:33:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:33:02,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:02,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:02,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:33:02,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306930322] [2020-09-17 02:33:02,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:33:02,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:33:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:02,081 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:33:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:03,732 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-17 02:33:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:33:03,734 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:33:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:03,735 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:33:03,735 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:33:03,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:33:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:33:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-17 02:33:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:33:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:33:03,738 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:33:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:03,738 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:33:03,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:33:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:33:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:33:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:03,738 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:03,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:03,939 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:03,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-17 02:33:03,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:03,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139223619] [2020-09-17 02:33:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139223619] [2020-09-17 02:33:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196537036] [2020-09-17 02:33:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:04,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:33:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:33:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:04,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:04,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:04,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:33:04,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495027561] [2020-09-17 02:33:04,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:04,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:04,528 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:33:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:06,668 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-17 02:33:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:33:06,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:33:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:06,670 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:33:06,670 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:33:06,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:33:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:33:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-17 02:33:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:33:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:33:06,674 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:33:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:06,674 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:33:06,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:33:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:33:06,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:06,675 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:06,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:33:06,885 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-17 02:33:06,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:06,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944365909] [2020-09-17 02:33:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:07,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944365909] [2020-09-17 02:33:07,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786249938] [2020-09-17 02:33:07,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:33:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:07,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:07,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:33:07,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611551299] [2020-09-17 02:33:07,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:33:07,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:33:07,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:33:07,445 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:33:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:09,130 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:33:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:33:09,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:33:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:09,132 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:33:09,132 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:33:09,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:33:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:33:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-17 02:33:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:33:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-17 02:33:09,135 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-17 02:33:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:09,135 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-17 02:33:09,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:33:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-17 02:33:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:33:09,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:09,136 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:09,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:09,337 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-17 02:33:09,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:09,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589257242] [2020-09-17 02:33:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:09,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589257242] [2020-09-17 02:33:09,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468821204] [2020-09-17 02:33:09,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:09,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:33:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:09,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:09,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:09,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:33:09,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858826933] [2020-09-17 02:33:09,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:09,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:09,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:09,928 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-17 02:33:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:12,031 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-17 02:33:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:33:12,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:33:12,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:12,033 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:33:12,033 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:33:12,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:33:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:33:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-17 02:33:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:33:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-17 02:33:12,036 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-17 02:33:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:12,036 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-17 02:33:12,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-17 02:33:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:33:12,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:12,037 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:12,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:12,238 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-17 02:33:12,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:12,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68529802] [2020-09-17 02:33:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:12,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68529802] [2020-09-17 02:33:12,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495835849] [2020-09-17 02:33:12,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:12,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:33:12,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:33:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:12,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:12,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:12,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:33:12,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837585057] [2020-09-17 02:33:12,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:12,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:12,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:12,902 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-17 02:33:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:15,305 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-17 02:33:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:33:15,306 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:33:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:15,307 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:33:15,307 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:33:15,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:33:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:33:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-17 02:33:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:33:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:33:15,310 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-17 02:33:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:15,310 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:33:15,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:33:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:15,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:15,311 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:15,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:15,512 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-17 02:33:15,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:15,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980582992] [2020-09-17 02:33:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:16,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980582992] [2020-09-17 02:33:16,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236325531] [2020-09-17 02:33:16,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:16,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:16,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:16,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:16,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:33:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:16,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:16,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:16,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69437817] [2020-09-17 02:33:16,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:16,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:16,189 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-17 02:33:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:18,295 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-17 02:33:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:33:18,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:18,296 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:33:18,296 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:33:18,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:33:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:33:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 02:33:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:33:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 02:33:18,299 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-17 02:33:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:18,300 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 02:33:18,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 02:33:18,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:18,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:18,300 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:18,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:18,501 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-17 02:33:18,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:18,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723391015] [2020-09-17 02:33:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723391015] [2020-09-17 02:33:19,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666216273] [2020-09-17 02:33:19,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:19,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:33:19,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:19,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:19,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:19,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:19,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051819168] [2020-09-17 02:33:19,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:19,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:19,169 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-17 02:33:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:20,053 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-17 02:33:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:33:20,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:20,056 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:33:20,056 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:33:20,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:33:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:33:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 02:33:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:33:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 02:33:20,059 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-17 02:33:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:20,059 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 02:33:20,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 02:33:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:20,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:20,060 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:20,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 02:33:20,266 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:20,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:20,267 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-17 02:33:20,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:20,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765161080] [2020-09-17 02:33:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:20,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765161080] [2020-09-17 02:33:20,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479994314] [2020-09-17 02:33:20,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:20,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:33:20,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:20,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:20,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:20,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:20,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785853555] [2020-09-17 02:33:20,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:20,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:20,993 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-17 02:33:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:21,884 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-17 02:33:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:33:21,886 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:21,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:21,886 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:33:21,886 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:33:21,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:33:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:33:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-17 02:33:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:33:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-17 02:33:21,889 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-17 02:33:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:21,889 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-17 02:33:21,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-17 02:33:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:21,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:21,890 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:22,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:33:22,091 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:22,091 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-17 02:33:22,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:22,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63058056] [2020-09-17 02:33:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63058056] [2020-09-17 02:33:22,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224810171] [2020-09-17 02:33:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:22,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:22,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:22,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302380592] [2020-09-17 02:33:22,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:22,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:22,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:22,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:22,781 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-17 02:33:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:23,863 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-17 02:33:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:33:23,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:23,865 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:33:23,865 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:33:23,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:33:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:33:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-17 02:33:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:33:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-17 02:33:23,867 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-17 02:33:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:23,868 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-17 02:33:23,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-17 02:33:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:23,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:23,868 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:24,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:33:24,069 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-17 02:33:24,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:24,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360711415] [2020-09-17 02:33:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:24,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360711415] [2020-09-17 02:33:24,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102128713] [2020-09-17 02:33:24,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:24,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:24,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:24,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:24,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:24,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576873838] [2020-09-17 02:33:24,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:24,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:24,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:24,806 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-17 02:33:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:26,018 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-17 02:33:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:33:26,020 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:26,020 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:33:26,020 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:33:26,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:33:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:33:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-17 02:33:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:33:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-17 02:33:26,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-17 02:33:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:26,024 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-17 02:33:26,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-17 02:33:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:26,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:26,025 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:26,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:33:26,234 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:26,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-17 02:33:26,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:26,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064382780] [2020-09-17 02:33:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:26,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064382780] [2020-09-17 02:33:26,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349866301] [2020-09-17 02:33:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:26,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:33:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:26,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:26,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:26,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825545611] [2020-09-17 02:33:26,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:26,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:26,845 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-17 02:33:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:28,052 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-17 02:33:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:33:28,054 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:28,054 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:33:28,054 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:33:28,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:33:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:33:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-17 02:33:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:33:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-17 02:33:28,057 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-17 02:33:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:28,057 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-17 02:33:28,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-17 02:33:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:28,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:28,058 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:28,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:28,259 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:28,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-17 02:33:28,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:28,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595528357] [2020-09-17 02:33:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:28,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595528357] [2020-09-17 02:33:28,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493252358] [2020-09-17 02:33:28,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:28,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:28,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:28,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:28,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:28,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:29,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:29,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752850630] [2020-09-17 02:33:29,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:29,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:29,005 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-17 02:33:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:30,353 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-17 02:33:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:33:30,354 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:30,355 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:33:30,355 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:33:30,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:33:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:33:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-17 02:33:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:33:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-17 02:33:30,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-17 02:33:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:30,358 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-17 02:33:30,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-17 02:33:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:30,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:30,359 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:30,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:33:30,559 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-17 02:33:30,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:30,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632820801] [2020-09-17 02:33:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632820801] [2020-09-17 02:33:31,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616487387] [2020-09-17 02:33:31,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:31,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:33:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:31,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:31,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:31,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:31,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:31,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996022186] [2020-09-17 02:33:31,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:31,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:31,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:31,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:31,235 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-17 02:33:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:32,506 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-17 02:33:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:33:32,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:32,508 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:33:32,509 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:33:32,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:33:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:33:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-17 02:33:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:33:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-17 02:33:32,512 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-17 02:33:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:32,512 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-17 02:33:32,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-17 02:33:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:32,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:32,513 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:32,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:32,714 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:32,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:32,714 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-17 02:33:32,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:32,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647761735] [2020-09-17 02:33:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647761735] [2020-09-17 02:33:33,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461627486] [2020-09-17 02:33:33,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:33,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:33:33,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:33,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:33,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:33,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:33,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655673066] [2020-09-17 02:33:33,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:33,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:33,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:33,444 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-17 02:33:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:34,941 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-17 02:33:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:33:34,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:34,945 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:33:34,945 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:33:34,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:33:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:33:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-17 02:33:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:33:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-17 02:33:34,948 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-17 02:33:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:34,948 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-17 02:33:34,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-17 02:33:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:34,949 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:35,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:33:35,152 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-17 02:33:35,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:35,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241917414] [2020-09-17 02:33:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:35,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241917414] [2020-09-17 02:33:35,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236275571] [2020-09-17 02:33:35,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:35,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:35,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:35,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644627145] [2020-09-17 02:33:35,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:35,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:35,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:35,852 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-17 02:33:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:37,446 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-17 02:33:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:33:37,448 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:37,448 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:33:37,448 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:33:37,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:33:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:33:37,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-17 02:33:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:33:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-17 02:33:37,452 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-17 02:33:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:37,452 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-17 02:33:37,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-17 02:33:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:37,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:37,452 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:37,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:37,653 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:37,654 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-17 02:33:37,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:37,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109544064] [2020-09-17 02:33:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109544064] [2020-09-17 02:33:38,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449603748] [2020-09-17 02:33:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:38,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:38,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:38,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:38,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:38,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:38,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:38,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109635197] [2020-09-17 02:33:38,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:38,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:38,419 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-17 02:33:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:40,314 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-17 02:33:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:33:40,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:40,317 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:33:40,317 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:33:40,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:33:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:33:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-17 02:33:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:33:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-17 02:33:40,320 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-17 02:33:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:40,320 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-17 02:33:40,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-17 02:33:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:40,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:40,321 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:40,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:40,522 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:40,522 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-17 02:33:40,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:40,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594604517] [2020-09-17 02:33:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594604517] [2020-09-17 02:33:41,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571175053] [2020-09-17 02:33:41,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:41,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:33:41,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:41,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:41,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:41,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890756596] [2020-09-17 02:33:41,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:41,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:41,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:41,204 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-17 02:33:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:42,756 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-17 02:33:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:33:42,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:42,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:42,759 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:33:42,759 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:33:42,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:33:42,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:33:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-17 02:33:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:33:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-17 02:33:42,762 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-17 02:33:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:42,762 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-17 02:33:42,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-17 02:33:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:42,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:42,762 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:42,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:42,963 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-17 02:33:42,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:42,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689388777] [2020-09-17 02:33:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:43,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689388777] [2020-09-17 02:33:43,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506617469] [2020-09-17 02:33:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:43,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:43,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:43,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:43,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:43,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:43,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:43,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241612747] [2020-09-17 02:33:43,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:43,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:43,663 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-17 02:33:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:45,545 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-17 02:33:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:33:45,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:45,549 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:33:45,549 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:33:45,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:33:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:33:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-17 02:33:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:33:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-17 02:33:45,553 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-17 02:33:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:45,553 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-17 02:33:45,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-17 02:33:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:45,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:45,554 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:45,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:45,764 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-17 02:33:45,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:45,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093020229] [2020-09-17 02:33:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093020229] [2020-09-17 02:33:46,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086496640] [2020-09-17 02:33:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:46,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:33:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:46,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:46,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:46,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877315178] [2020-09-17 02:33:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:46,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:46,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:46,414 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-17 02:33:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:48,018 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-17 02:33:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:33:48,020 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:48,021 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:33:48,021 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:33:48,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:33:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:33:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-17 02:33:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:33:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-17 02:33:48,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-17 02:33:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:48,025 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-17 02:33:48,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-17 02:33:48,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:48,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:48,026 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:48,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 02:33:48,229 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-17 02:33:48,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:48,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727988773] [2020-09-17 02:33:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727988773] [2020-09-17 02:33:48,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394061571] [2020-09-17 02:33:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:48,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:33:48,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:48,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:48,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:48,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:48,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:48,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597345110] [2020-09-17 02:33:48,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:48,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:48,879 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-17 02:33:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:50,868 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-17 02:33:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:33:50,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:50,870 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:33:50,871 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:33:50,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:33:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:33:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-17 02:33:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:33:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-17 02:33:50,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-17 02:33:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:50,875 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-17 02:33:50,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-17 02:33:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:50,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:50,876 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:51,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:33:51,078 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-17 02:33:51,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:51,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500864687] [2020-09-17 02:33:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:51,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500864687] [2020-09-17 02:33:51,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256846402] [2020-09-17 02:33:51,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:51,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:51,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:51,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206468107] [2020-09-17 02:33:51,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:51,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:51,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:51,679 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-17 02:33:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:53,407 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-17 02:33:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:33:53,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:53,409 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:33:53,410 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:33:53,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:33:53,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:33:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-17 02:33:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:33:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:33:53,412 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-17 02:33:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:53,413 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:33:53,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:33:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:53,413 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:53,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:33:53,614 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-17 02:33:53,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:53,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68865592] [2020-09-17 02:33:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:54,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68865592] [2020-09-17 02:33:54,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128918692] [2020-09-17 02:33:54,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:54,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:33:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:54,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:54,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908795362] [2020-09-17 02:33:54,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:54,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:54,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:54,222 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-17 02:33:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:56,382 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-17 02:33:56,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:33:56,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:33:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:56,383 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:33:56,384 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:33:56,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:33:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:33:56,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-17 02:33:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:33:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:33:56,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-17 02:33:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:56,387 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:33:56,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:33:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:33:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:56,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:56,387 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:56,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:33:56,588 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-17 02:33:56,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:56,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932331514] [2020-09-17 02:33:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:57,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932331514] [2020-09-17 02:33:57,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793308026] [2020-09-17 02:33:57,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:57,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:33:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:57,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:57,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:33:57,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178996725] [2020-09-17 02:33:57,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:33:57,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:33:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:33:57,159 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-17 02:33:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:33:58,989 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-17 02:33:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:33:58,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:33:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:33:58,992 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:33:58,992 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:33:58,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:33:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:33:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-17 02:33:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:33:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-17 02:33:58,995 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-17 02:33:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:33:58,995 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-17 02:33:58,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:33:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-17 02:33:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:33:58,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:33:58,996 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:33:59,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:33:59,197 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:33:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:33:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-17 02:33:59,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:33:59,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875891684] [2020-09-17 02:33:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:33:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:33:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:59,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875891684] [2020-09-17 02:33:59,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537843067] [2020-09-17 02:33:59,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:33:59,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:33:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:33:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:33:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:33:59,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:33:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:33:59,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:33:59,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:33:59,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237419075] [2020-09-17 02:33:59,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:33:59,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:33:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:33:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:33:59,895 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-17 02:34:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:02,159 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-17 02:34:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:34:02,160 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:34:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:02,161 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:34:02,161 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:34:02,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:34:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:34:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-17 02:34:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:34:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:34:02,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-17 02:34:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:02,164 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:34:02,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:34:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:34:02,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:02,165 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:02,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:34:02,366 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-17 02:34:02,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:02,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833951782] [2020-09-17 02:34:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:02,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833951782] [2020-09-17 02:34:02,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291124266] [2020-09-17 02:34:02,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:34:02,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:34:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:34:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:02,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:02,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:34:02,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991209897] [2020-09-17 02:34:02,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:34:02,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:34:02,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:34:02,927 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-17 02:34:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:05,023 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-17 02:34:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:34:05,025 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:34:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:05,025 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:34:05,026 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:34:05,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:34:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:34:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-17 02:34:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:34:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-17 02:34:05,029 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-17 02:34:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:05,029 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-17 02:34:05,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:34:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-17 02:34:05,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:34:05,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:05,030 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:05,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:05,235 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-17 02:34:05,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:05,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852044144] [2020-09-17 02:34:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:05,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852044144] [2020-09-17 02:34:05,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723021542] [2020-09-17 02:34:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:34:05,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:34:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:34:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:05,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:05,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:05,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:34:05,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618757292] [2020-09-17 02:34:05,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:05,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:05,857 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-17 02:34:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:08,311 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-17 02:34:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:34:08,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:34:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:08,313 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:34:08,313 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:34:08,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:34:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:34:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 02:34:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:34:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-17 02:34:08,316 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-17 02:34:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:08,316 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-17 02:34:08,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-17 02:34:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:08,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:08,316 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:08,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:34:08,517 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-17 02:34:08,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:08,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724713276] [2020-09-17 02:34:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:09,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724713276] [2020-09-17 02:34:09,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919058025] [2020-09-17 02:34:09,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:09,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:09,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:09,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570925813] [2020-09-17 02:34:09,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:09,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:09,364 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-17 02:34:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:10,501 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-17 02:34:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:34:10,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:10,503 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:34:10,503 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:34:10,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:34:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:34:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-17 02:34:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:10,506 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:10,506 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:10,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:10,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:10,507 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:10,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:10,708 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-17 02:34:10,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:10,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404102479] [2020-09-17 02:34:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:11,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404102479] [2020-09-17 02:34:11,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124533336] [2020-09-17 02:34:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:11,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:11,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:11,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:11,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:11,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972516577] [2020-09-17 02:34:11,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:11,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:11,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:11,617 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:12,961 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-17 02:34:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:34:12,963 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:12,964 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:34:12,964 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:34:12,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:34:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:34:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-17 02:34:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:12,968 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:12,969 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:12,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:12,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:12,970 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:13,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-17 02:34:13,180 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-17 02:34:13,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:13,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659563904] [2020-09-17 02:34:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:13,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659563904] [2020-09-17 02:34:13,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432593893] [2020-09-17 02:34:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:34:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:14,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:14,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:14,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271041572] [2020-09-17 02:34:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:14,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:14,004 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:15,397 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-17 02:34:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:34:15,398 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:15,399 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:34:15,399 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:34:15,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:34:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:34:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-17 02:34:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:15,402 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:15,402 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:15,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:15,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:15,408 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:15,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:15,609 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-17 02:34:15,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:15,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700560114] [2020-09-17 02:34:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700560114] [2020-09-17 02:34:16,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479434778] [2020-09-17 02:34:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:16,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:16,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:16,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:16,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:16,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:16,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:16,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:16,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504406745] [2020-09-17 02:34:16,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:16,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:16,491 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:18,041 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-17 02:34:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:34:18,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:18,042 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:34:18,043 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:34:18,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:34:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:34:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-17 02:34:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:18,045 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:18,045 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:18,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:18,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:18,046 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:18,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 02:34:18,247 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-17 02:34:18,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:18,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922921031] [2020-09-17 02:34:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:18,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922921031] [2020-09-17 02:34:18,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563322065] [2020-09-17 02:34:18,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:19,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:34:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:19,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:19,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:19,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:19,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141216543] [2020-09-17 02:34:19,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:19,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:19,028 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:20,597 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-17 02:34:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:34:20,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:20,600 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:34:20,600 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:34:20,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:34:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:34:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-17 02:34:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:20,604 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:20,604 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:20,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:20,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:20,605 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:20,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-17 02:34:20,813 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-17 02:34:20,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:20,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530537444] [2020-09-17 02:34:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:21,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530537444] [2020-09-17 02:34:21,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116797406] [2020-09-17 02:34:21,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:21,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:34:21,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:21,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:21,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:21,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:21,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540437677] [2020-09-17 02:34:21,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:21,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:21,759 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:23,772 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-17 02:34:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:34:23,774 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:23,774 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:34:23,774 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:34:23,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:34:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:34:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-17 02:34:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:23,777 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:23,778 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:23,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:23,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:23,779 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:23,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 02:34:23,983 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:23,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:23,983 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-17 02:34:23,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:23,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299418448] [2020-09-17 02:34:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299418448] [2020-09-17 02:34:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436868660] [2020-09-17 02:34:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:24,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:24,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:24,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:24,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742201818] [2020-09-17 02:34:24,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:24,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:24,755 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:26,306 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-17 02:34:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:34:26,308 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:26,309 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:34:26,309 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:34:26,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:34:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:34:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-17 02:34:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:26,313 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:26,313 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:26,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:26,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:26,314 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:26,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:26,519 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:26,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:26,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-17 02:34:26,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:26,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7648566] [2020-09-17 02:34:26,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:27,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7648566] [2020-09-17 02:34:27,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886197489] [2020-09-17 02:34:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:27,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:27,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:27,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:27,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:27,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:27,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:27,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:27,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062965234] [2020-09-17 02:34:27,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:27,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:27,357 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:29,227 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-17 02:34:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:34:29,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:29,230 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:34:29,230 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:34:29,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:34:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:34:29,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-17 02:34:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:29,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:29,233 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:29,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:29,234 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:29,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:29,234 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:29,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:29,234 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:29,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 02:34:29,435 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-17 02:34:29,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:29,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799381929] [2020-09-17 02:34:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:30,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799381929] [2020-09-17 02:34:30,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273400841] [2020-09-17 02:34:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:34:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:30,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:30,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:30,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510310375] [2020-09-17 02:34:30,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:30,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:30,187 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:31,894 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-17 02:34:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:34:31,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:31,895 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:34:31,896 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:34:31,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:34:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:34:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-17 02:34:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:31,898 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:31,898 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:31,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:31,899 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:32,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:32,100 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-17 02:34:32,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:32,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215269579] [2020-09-17 02:34:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:32,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215269579] [2020-09-17 02:34:32,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46494495] [2020-09-17 02:34:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:32,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:32,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:32,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:32,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:32,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:32,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:32,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975625523] [2020-09-17 02:34:32,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:32,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:32,900 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:35,022 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-17 02:34:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:34:35,024 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:35,024 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:34:35,024 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:34:35,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:34:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:34:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-17 02:34:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:35,027 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:35,027 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:35,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:35,027 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:35,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 02:34:35,231 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-17 02:34:35,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:35,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77779754] [2020-09-17 02:34:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:35,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77779754] [2020-09-17 02:34:35,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743555576] [2020-09-17 02:34:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:35,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:34:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:35,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:35,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:35,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222606493] [2020-09-17 02:34:35,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:35,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:35,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:35,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:35,987 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:37,821 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-17 02:34:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:34:37,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:37,824 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:34:37,824 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:34:37,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:34:37,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:34:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-17 02:34:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:37,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:37,828 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:37,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:37,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:37,828 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:38,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:38,029 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-17 02:34:38,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:38,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136275586] [2020-09-17 02:34:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:38,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136275586] [2020-09-17 02:34:38,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265556331] [2020-09-17 02:34:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:38,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:34:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:39,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:39,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:39,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:39,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435795095] [2020-09-17 02:34:39,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:39,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:39,042 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:41,592 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-17 02:34:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:34:41,593 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:41,594 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:34:41,594 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:34:41,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:34:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:34:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-17 02:34:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:41,596 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:41,596 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:41,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:41,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:41,597 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:41,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-17 02:34:41,798 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-17 02:34:41,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:41,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536340300] [2020-09-17 02:34:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:42,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536340300] [2020-09-17 02:34:42,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095306489] [2020-09-17 02:34:42,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:42,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:42,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:42,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593818820] [2020-09-17 02:34:42,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:42,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:42,516 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:44,783 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-17 02:34:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:34:44,785 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:44,786 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:34:44,786 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:34:44,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:34:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:34:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-17 02:34:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:44,789 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:44,789 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:44,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:44,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:44,790 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:44,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:44,991 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-17 02:34:44,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:44,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324575927] [2020-09-17 02:34:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:45,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324575927] [2020-09-17 02:34:45,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159377358] [2020-09-17 02:34:45,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:45,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:34:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:45,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:45,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:45,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:45,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987361669] [2020-09-17 02:34:45,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:45,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:45,810 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:48,360 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-17 02:34:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:34:48,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:48,361 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:34:48,361 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:34:48,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:34:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:34:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-17 02:34:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:48,365 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:48,365 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:48,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:48,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:48,365 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:48,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:48,567 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-17 02:34:48,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:48,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278006272] [2020-09-17 02:34:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:49,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278006272] [2020-09-17 02:34:49,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725006856] [2020-09-17 02:34:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:49,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:34:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:49,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:49,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:49,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127569471] [2020-09-17 02:34:49,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:49,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:49,356 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:51,682 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-17 02:34:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:34:51,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:51,686 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:34:51,686 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:34:51,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:34:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:34:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-17 02:34:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:51,689 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:51,690 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:51,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:51,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:51,690 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:51,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 02:34:51,891 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:51,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-17 02:34:51,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:51,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504674605] [2020-09-17 02:34:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:52,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504674605] [2020-09-17 02:34:52,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604200752] [2020-09-17 02:34:52,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:52,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:34:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:52,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:52,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:52,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:52,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:52,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221279506] [2020-09-17 02:34:52,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:52,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:52,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:52,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:52,738 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:34:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:55,526 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:34:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:34:55,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:34:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:55,528 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:34:55,528 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:34:55,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:34:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:34:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-17 02:34:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:34:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:34:55,531 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:34:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:55,531 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:34:55,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:34:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:34:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:55,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:55,532 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:55,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-17 02:34:55,733 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-17 02:34:55,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:55,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595820160] [2020-09-17 02:34:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:56,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595820160] [2020-09-17 02:34:56,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911962853] [2020-09-17 02:34:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:56,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:34:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:56,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:56,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:56,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:34:56,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965253198] [2020-09-17 02:34:56,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:34:56,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:34:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:34:56,363 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:34:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:34:58,731 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-17 02:34:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:34:58,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:34:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:34:58,733 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:34:58,733 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:34:58,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:34:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:34:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-17 02:34:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:34:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:34:58,736 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:34:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:34:58,736 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:34:58,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:34:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:34:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:34:58,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:34:58,736 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:34:58,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 02:34:58,937 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:34:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:34:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-17 02:34:58,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:34:58,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761974765] [2020-09-17 02:34:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:34:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:34:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:59,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761974765] [2020-09-17 02:34:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075008631] [2020-09-17 02:34:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:34:59,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:34:59,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:34:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:34:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:34:59,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:34:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:34:59,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:34:59,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:34:59,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001970026] [2020-09-17 02:34:59,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:34:59,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:34:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:34:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:34:59,733 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:35:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:02,952 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-17 02:35:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:35:02,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:35:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:02,954 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:35:02,955 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:35:02,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:35:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:35:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-17 02:35:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:35:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:35:02,957 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:35:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:02,957 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:35:02,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:35:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:35:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:35:02,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:02,958 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:03,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 02:35:03,159 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-17 02:35:03,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:03,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812399224] [2020-09-17 02:35:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:03,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812399224] [2020-09-17 02:35:03,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766208767] [2020-09-17 02:35:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:35:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:03,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:03,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:35:03,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557599657] [2020-09-17 02:35:03,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:35:03,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:35:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:03,945 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:35:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:06,533 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-17 02:35:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:35:06,536 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:35:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:06,537 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:35:06,537 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:35:06,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:35:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:35:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-17 02:35:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:35:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-17 02:35:06,540 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-17 02:35:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:06,540 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-17 02:35:06,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:35:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-17 02:35:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:35:06,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:06,541 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:06,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 02:35:06,742 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-17 02:35:06,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:06,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059282102] [2020-09-17 02:35:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:07,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059282102] [2020-09-17 02:35:07,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529242228] [2020-09-17 02:35:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:07,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:35:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:07,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:07,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:07,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:35:07,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187091622] [2020-09-17 02:35:07,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:35:07,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:35:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:07,578 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-17 02:35:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:10,840 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-09-17 02:35:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:35:10,842 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:35:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:10,842 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:35:10,843 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:35:10,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:35:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:35:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:35:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:35:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-17 02:35:10,845 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-17 02:35:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:10,845 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-17 02:35:10,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:35:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-17 02:35:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:35:10,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:10,846 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:11,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:11,047 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-17 02:35:11,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:11,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465979296] [2020-09-17 02:35:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:11,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465979296] [2020-09-17 02:35:11,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654015499] [2020-09-17 02:35:11,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:11,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:35:11,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:11,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:35:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:11,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:11,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:11,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:35:11,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417584259] [2020-09-17 02:35:11,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:35:11,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:11,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:35:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:11,838 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-17 02:35:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:14,482 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-17 02:35:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:35:14,483 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:35:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:14,484 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:35:14,484 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:35:14,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:35:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:35:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-17 02:35:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:35:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-17 02:35:14,487 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-17 02:35:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:14,487 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-17 02:35:14,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:35:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-17 02:35:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:35:14,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:14,488 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:14,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 02:35:14,689 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-17 02:35:14,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:14,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446931839] [2020-09-17 02:35:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:15,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446931839] [2020-09-17 02:35:15,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489100587] [2020-09-17 02:35:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:15,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:15,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:15,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:15,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:15,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 02:35:15,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-09-17 02:35:15,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413334936] [2020-09-17 02:35:15,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:15,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:15,120 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-09-17 02:35:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:15,202 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-09-17 02:35:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:15,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-17 02:35:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:15,205 INFO L225 Difference]: With dead ends: 421 [2020-09-17 02:35:15,205 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:35:15,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:35:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-17 02:35:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:35:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-09-17 02:35:15,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-09-17 02:35:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:15,209 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-09-17 02:35:15,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-09-17 02:35:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:35:15,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:15,209 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:15,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:15,417 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-17 02:35:15,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:15,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520137327] [2020-09-17 02:35:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:16,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520137327] [2020-09-17 02:35:16,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005557001] [2020-09-17 02:35:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:16,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:35:16,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:17,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 02:35:17,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-09-17 02:35:17,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30283988] [2020-09-17 02:35:17,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:17,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:35:17,559 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-09-17 02:35:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:17,648 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-09-17 02:35:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:17,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-17 02:35:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:17,652 INFO L225 Difference]: With dead ends: 256 [2020-09-17 02:35:17,652 INFO L226 Difference]: Without dead ends: 0 [2020-09-17 02:35:17,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:35:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-17 02:35:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-17 02:35:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-17 02:35:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-17 02:35:17,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-17 02:35:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:17,654 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-17 02:35:17,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-17 02:35:17,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-17 02:35:17,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:17,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 02:35:17 BasicIcfg [2020-09-17 02:35:17,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-17 02:35:17,872 INFO L168 Benchmark]: Toolchain (without parser) took 390241.70 ms. Allocated memory was 138.9 MB in the beginning and 151.5 MB in the end (delta: 12.6 MB). Free memory was 100.9 MB in the beginning and 85.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,874 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,875 INFO L168 Benchmark]: CACSL2BoogieTranslator took 850.94 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 158.5 MB in the end (delta: -58.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,875 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.97 ms. Allocated memory is still 201.3 MB. Free memory was 158.5 MB in the beginning and 156.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,878 INFO L168 Benchmark]: Boogie Preprocessor took 37.41 ms. Allocated memory is still 201.3 MB. Free memory was 156.5 MB in the beginning and 154.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,879 INFO L168 Benchmark]: RCFGBuilder took 546.95 ms. Allocated memory is still 201.3 MB. Free memory was 154.5 MB in the beginning and 134.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-17 02:35:17,879 INFO L168 Benchmark]: TraceAbstraction took 388731.62 ms. Allocated memory was 201.3 MB in the beginning and 151.5 MB in the end (delta: -49.8 MB). Free memory was 134.0 MB in the beginning and 85.5 MB in the end (delta: 48.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-17 02:35:17,882 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 850.94 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.5 MB in the beginning and 158.5 MB in the end (delta: -58.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.97 ms. Allocated memory is still 201.3 MB. Free memory was 158.5 MB in the beginning and 156.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.41 ms. Allocated memory is still 201.3 MB. Free memory was 156.5 MB in the beginning and 154.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 546.95 ms. Allocated memory is still 201.3 MB. Free memory was 154.5 MB in the beginning and 134.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 388731.62 ms. Allocated memory was 201.3 MB in the beginning and 151.5 MB in the end (delta: -49.8 MB). Free memory was 134.0 MB in the beginning and 85.5 MB in the end (delta: 48.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 388.5s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 232.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 3926 SDtfs, 13726 SDslu, 25985 SDs, 0 SdLazy, 27854 SolverSat, 15956 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13656 GetRequests, 4495 SyntacticMatches, 234 SemanticMatches, 8927 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91499 ImplicationChecksByTransitivity, 243.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 241 MinimizatonAttempts, 6068 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.4s SsaConstructionTime, 7.8s SatisfiabilityAnalysisTime, 84.4s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4136 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 290/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...